Bladder Scanner Bladder Volume Test Instrument (Portable Design)
Customized: Non-Customized
Certification: CE, ISO13485
Scale: Small
Type: Health Care Intercom System
Medical: for Human
BVT01 Bladder Scanner(With Internal Printer) What is the BVT01BVT01 is a 3D ultrasound medical device to quickly and accurately measure the bladder volume and post void residual volume Why Use BVT01The bladder management towards paraplegics is the important part of the daily care. Because either the patient or the nurse can not judge the bladder volume according to the experience, the patient's bladder sometimes overfill, such potential risk of the upper urinary tract deterioration, exists, and frequent catheterization increases the occurrence rate of the infection of iatrogenic urinary system. And frequent insert catheter will increase the pain and psychological burden to the patient, more easy to damage the urinary tract.User Friendly InterfaceFeatures15.7" Color touch LCD, convenient for patient and user operation2Easily review 12 frames of scan slices3Built-in printer can print in real time4USB port support massive data and software update5Dual-power supply mode, increase mobility, built-in large capacity battery support more than 8 working hours62D pre-scan image can clearly show 2D structure of bladder, effectively assist to get accurate measurement result7Built-in 6 kinds of languages (English, French, Russian, Spanish, Portuguese, Chinese) support multi-language customizedApplicationMedical serviceUrologyObstetrics-gynecologyGeriatricsPediatricsRehabilitationSurgicalOperation roomEmergencySpecial careRehabilitation careHome healthConfigurationStandard Configuration1Main Unit: 1pc2Probe: 1 pc3Power Adopter: 1pc4Touch Pen: 1pc5Battery: 1 pcOptional Configuration1Battery Charger2Foot Switch3Trolley
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Noninvasive Measurement Urodynamic Analyzer System for Urinary Incontinence, Bladder Function Test Detecting Hospital Instrument with ISO, Ics,
Classification: Clinical Urodynamic Analyzer
Type: Urodynamic Detection System
Certification: ISO13485
Group: All
Material: High Tech Materials
SpecificationItemsDetailsPressure measuring range Pressure: -50cmH20(-4.9kPa)~200cmH20(19.6kPa) Error range: ± 3%Dragger a) Length: ≥280mmb) 4 Speeds: 0.5mm/s, 1.0mm/s, 2.0mm/s, 4.0mm/s, Error range ± 3% Syring pumpInjection speed: 2mL/min~5mL/min (1mL /min each time), error range ±3% EMG testing a) Range for responsing: 20μV~1mVb) Length of electrode wire: ≥180cm Exhibition & Conference Company ProfilePotent Medical is one of the biggest manufacturers of medical laser equipment, located in Guangzhou,China,specializing in R&D,manufacturing and marketing medical laser devices-"Holmium Laser System & Diode Laser System",which have successively obtained ISO13485, CE, CFDA etc.Potent Medical owns a team of professional doctors and experts of more than 10 years clinical experience,has been working with well-known universities and national laser research centers,stably supplying to over 45 countries and owns over 2000 references of holmium laser worldwide since was established in 2004. Potent Medical aims to provide "Advanced Medical Technology, Efficient and High Quality Products,Satisfactory Services" for health care of global market. Packaging & ShippingFAQQ1.Where can we meet face to face talk in detail?A: You can visit our factory through different exhibitions, such as MEDICA GERMANY, EXPOMED TURKEY, USICON INDIA, ARAB HEALTH DUBAI.Q2.What about lead time?A: It will take 5-8 working days for the machine. The order quantity above will take 1-2 weeks for mass production. Q3.Is there a MOQ for this order?A:Low MOQ, 1 PCS. Q4.How do you deliver the goods?How long will it take to get there?A:Our machine has no electric charge, magnetic and other dangerous goods. We can arrange air transportation, sea transportation, DHL,FEDEX and other express delivery according to your requirements.The limitation of transportation is updated according to different modes of transportation. Q5.How do I execute an order?A: First of all, let us know your request or application. Secondly, we will offer you the price according to your request or our suggestion. The third customer confirms the payment method. Fourth, we arrange production and delivery within the agreed time. Q6.Can I print products with my logo?A:Accept OEM.Please inform us formally before our production and confirm the design according to our change. Q7: Does the product have warranty?A: Yes, we guarantee our product for one year. Q8: After-sales service support?A: Yes, we provide after-sales installation guidance, online training guidance, dispatched engineers, training services for well-known professors and so on.
96automated Nucleic Acid Extraction Medical Laboratory Instrument Equipment for PCR Rapid Diagnostic Test
Classification: Nucleic Acid Extraction Equipment
Type: Nucleic Acid Extraction Instrument
Certification: CE, 13485, FDA, Ivdd
Peoplesample Throughput: 1-96
Processing Volume: 10-11000UL
Product Description1. OverviewBioTeke's Automated Nucleic Acid Extraction System uses cutting-edge magnetic bead separation technology to achieve fast and easy operation of DNA/RNA automation extraction procedure. All separation and purification procedures are completed in 96 well plates and there is no need for steps like regular centrifugation and filtering required by extraction and purification. The system can complete fast extraction and purification process from 1 to 32 samples, including but not limited to blood, tissue, cells, swab, virus and other clinical or forensic samples. The extracted high quality DNA/RNA is ready for use in highly sensitive downstream analysis, such as qPCR, clinical molecular diagnostic, analysis of gene expression, gene analysis, forensic and infectious disease research etc. The purified nucleic acid can be applied directly for the next enzyme cleavage, identification as well as disease diagnosis and treatment etc. As a famous domestic nucleic acid separation and purification technology company, BioTeke provides over 100 kinds of extraction kits for use with this instrument to maximize its application and minimize its costs.This automated nucleic acid extractor uses magnetic rods on magnetic rod racks to transfer magnetic beads bound with nucleic acid to different wells, and mixes liquid at fast speed and repeatedly with magnetic sleeves outside magnetic rods. The liquid is mixed evenly. And after cell lysis, nucleic acid binding, washing and elution, highly purified DNA/RNA nucleic acid molecules is finally achieved.2. Product highlightsa. Large screen English operation panelLarge screen, full color display, touch screen English operation panel, easy to use.b. Precise controlBuilt-in engineering computer, no need to connect to PC. Single machine operation can help save more space and energy and provide highly stable automatic control system.c. Temperature controlCustomer can define lysis and elution temperature as needed.d. Free programmingPowerful program editing function allows flexible and efficient defining of your application to meet requirements of various reagents.e. High purity & high yieldThe purification program can be optimized based on reagents. And with precise incubation time, higher extraction efficiency can be achieved. The highly purified DNA/RNA can be used directly for PCR and RT-PCR.f. Stable resultsDiscrepancies and errors caused by manual operation can be avoided. The results are stable and come with good repeatability.3. After-sales service:Our nucleic acid R&D team has more than ten years of experience in the industry and provides powerful after-sales support.Detailed PhotosCertificationsCompany Profile
96automated Nucleic Acid Extraction Medical Laboratory Instrument Equipment for PCR Rapid Diagnostic Test
Classification: Nucleic Acid Extraction Equipment
Type: Nucleic Acid Extraction Instrument
Certification: CE, 13485, FDA, Ivdd
Peoplesample Throughput: 1-96
Processing Volume: 10-11000UL
Product Description1. OverviewBioTeke's Automated Nucleic Acid Extraction System uses cutting-edge magnetic bead separation technology to achieve fast and easy operation of DNA/RNA automation extraction procedure. All separation and purification procedures are completed in 96 well plates and there is no need for steps like regular centrifugation and filtering required by extraction and purification. The system can complete fast extraction and purification process from 1 to 32 samples, including but not limited to blood, tissue, cells, swab, virus and other clinical or forensic samples. The extracted high quality DNA/RNA is ready for use in highly sensitive downstream analysis, such as qPCR, clinical molecular diagnostic, analysis of gene expression, gene analysis, forensic and infectious disease research etc. The purified nucleic acid can be applied directly for the next enzyme cleavage, identification as well as disease diagnosis and treatment etc. As a famous domestic nucleic acid separation and purification technology company, BioTeke provides over 100 kinds of extraction kits for use with this instrument to maximize its application and minimize its costs.This automated nucleic acid extractor uses magnetic rods on magnetic rod racks to transfer magnetic beads bound with nucleic acid to different wells, and mixes liquid at fast speed and repeatedly with magnetic sleeves outside magnetic rods. The liquid is mixed evenly. And after cell lysis, nucleic acid binding, washing and elution, highly purified DNA/RNA nucleic acid molecules is finally achieved.2. Product highlightsa. Large screen English operation panelLarge screen, full color display, touch screen English operation panel, easy to use.b. Precise controlBuilt-in engineering computer, no need to connect to PC. Single machine operation can help save more space and energy and provide highly stable automatic control system.c. Temperature controlCustomer can define lysis and elution temperature as needed.d. Free programmingPowerful program editing function allows flexible and efficient defining of your application to meet requirements of various reagents.e. High purity & high yieldThe purification program can be optimized based on reagents. And with precise incubation time, higher extraction efficiency can be achieved. The highly purified DNA/RNA can be used directly for PCR and RT-PCR.f. Stable resultsDiscrepancies and errors caused by manual operation can be avoided. The results are stable and come with good repeatability.3. After-sales service:Our nucleic acid R&D team has more than ten years of experience in the industry and provides powerful after-sales support.Detailed PhotosCertificationsCompany Profile
Battery Internal Resistance Tester Portable Battery Cell Resistance Tester Digital Handheld Impedance Tester Battery Analyzer Battery Test Equipment
After-sales Service: 1 Year
Warranty: 1 Year
Type: Storage Battery Tester
Test Region: Charge and Discharge
Application: Lead-acid Battery
General Information HDGC3918 Battery Tester with AC discharge measurement method is used to measure the voltage and Conductance of battery, which can judge the capacity and state of heath of battery .The measurement data can be read on the instrument display directly. And it can also be uploaded to PC simply by USB drive. With the analysis software, you could not only keep a record of the testing result but also have analyzed for the status of batteries in different testing conditions.Features Intelligent, hand-held and easy-to-useColorful touch screen with optional operations of keyboard and touch screenSimultaneously test for voltage, conductance Fast testing for single cell and multi-cells in seconds with testing data auto savingStrong anti-interference in high current with stable and accurate performance Direct USB drive for software update and data transfer to PC for further analyzingPowerful PC management software, convenient for data storage, analyzing and report printing Build-in reference value and self-defined value for comparison of testing result Technical Parameter Measurement Range Conductance: 100~19,990SVoltage: 0.000v--16vMin Measurement Resolution Conductance: 0.001SVoltage:1mVMeasurement Accuracy Conductance: ±1%rdg ±6dgtVoltage: ±0.2%rdg ±6dgtPower Supply Li-ion batteryWorking Time More than 8 hoursMeasurement data memory Storage >3000 cellsDisplay 5 inch touch screen . Dimension 220 x 170 x 60mmWeight 1kg
Lithium Battery Capacity Divider Mdsc-S11-128/10A
After-sales Service: 1 Year
Warranty: 1 Year
Type: Batteries Monomer Tester
Test Region: All
Application: Lithium-ion Battery
Professional battery testing equipment:Three key technologies:1. Energy saving: comprehensive energy saving of more than 70%, high-power inverter technology2. High efficiency: labor efficiency increased by 50%3. High quality: accuracy deviation <0.5% after 500 consecutive charging and discharging, high precision and stable detection technologyEnergy-saving battery based on high-frequency power feedback technologyThe working principle of chemical composition equipment:Charging mode: PWM switching power supply mode is adopted to realize constant current and constant voltage charging of the battery.Advantages: high power conversion efficiency, generally above 85%.Discharge mode: First, the voltage of the battery is increased by the PWM boost circuit and sent to the inverter power supply, and then gradually increased to be converted into AC power and sent to the AC grid, and finally the battery discharge power is fed back and reused.Advantages: The discharged electric energy of the power supply is well recycled and reused, and the energy saving effect is obvious.Why Choose UsProduct stability: Single-point independent constant current and constant voltage power supply, complete protection functions, stable operation, selected materials, fine craftsmanship, higher service life than peers, and fast inspection speed.Technical excellence: The feeder-type energy-saving mode design is adopted, which has high energy-saving efficiency, flexibility, and humanized intelligent operation. The product linearity, accuracy and speed have reached high standards, and the maintenance and upgrades are good for expansion.Accuracy: Each battery fixture is designed with the internationally popular four-wire principle, which avoids the superimposition of the internal resistance of the tester on the internal resistance of the battery and makes the test results more accurate.Flexible: When the battery under test has low voltage, undercurrent, overvoltage, or overcurrent, the control system will close this channel and separate the battery from the device.Cost-effective: rich experience, strong technology, professional management team, wide range of product use and praise from customers, the performance indicators and product quality of similar products have the most cost-effective advantages.7*24 hours after-sales service: The product is guaranteed for one year, free of charge and careful technology.SpecificationEquipment structure:modelMDSC-S11-128-10AMHSC-S12-512-3ADevice channel numberThe whole machine has a total of 128 channelsThe whole machine has a total of 512 channelsDimensions950mm wide × 580mm deep × 1900mm highLength 1684MM, width 756MM, height 1840MM, chassis width 500MMChassis colorBright gray (customizable)Standard blue and black (customizable)Fixture formFlat head fixture65 blue and white buckleFixture spacing50mm-180mm85CMSupport battery specificationsCylindrical batteryPolymer batteryPower supplyThree-phase five-wire system AC380V±10%, 50HZWorking power consumption≤8KWworking environmentTemperature 0~40ºC, relative humidity≤80%Cooling methodNatural intake, upward exhaustChannel parameters:modelMDSC-S11-128/10AMDSC-S12-512-3AVoltage measurement range0~5VBattery voltage rangeCharge 0~4.5V; Discharge 4.5~2VConstant voltage range2.5~4.5VVoltage accuracy±(1‰ reading+1‰ full scale)±(0.5‰ reading+0.5‰ full scale)Voltage resolution1mVVoltage stability≤1‰≤0.5‰Current rangeCharge 100mA~10A; Discharge 100mA~10ACharge 10mA~10A; Discharge 10mA~10ACurrent accuracy±(1‰ reading+1‰ full scale)±(0.5‰ reading+0.5‰ full scale)Current resolution10mA1mAStable current≤1‰≤0.5‰Software:modelMDSC-S11-128-10AMHSC-S12-512-3Away to controlThe software is installed on the computer to connect to the equipment, and the whole cabinet is controlledcommunication methodSerial port, baud rate 57600Process settingsUp to 32 steps and 256 cycles can be setCharging modeConstant current, constant voltage, constant current and constant voltageCharging cut-off conditionVoltage, current, time, capacityDischarge modeConstant currentDischarge cut-off conditionVoltage, time, capacityProtective functionOvervoltage, undervoltage, overcurrent, undercurrent, overcapacity protection, power failure protection, data breakpoint recoverytime limitArbitrarily set within 0~30000 minutes, the time unit is minTime accuracy≤±1‰Sampling inspection cycle≤4sMinimum data recording frequency≤5sBattery sortingSort by (capacity, time, open circuit voltage, discharge platform, etc.)data processingCan record voltage, current, time, capacity and other data, automatically calculate constant current charge ratio, capacity loss, discharge efficiency, average voltage, median voltage and other data, provide data graphs and cycle diagrams; can output generated text, EXCEL, WORD Or MDB database format filePacking & DeliveryTo better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided.FactoryFAQQ. Are you a manufacturer or a trading company?A. We are professional laboratory instrument manufacturers, have their own design team and factory, have mature technical experience, and can guarantee the quality of products and the optimal price. Q. Our country's power supply and plug are different. How do you solve it?A. We can supply a transformer and plug according to your local requirements according to the power plug of different countries.Q. How long is your delivery time? If I want to customize the instrument, how long does it take?A.1. If the goods are in stock, it is 5-10 days. 2. We can provide customized services for our customers. It usually takes 30-60 days depending on the specifications of the custom instrument.Q. How to pay?A.T / T, L / C, D / P, etc., it is recommended to use Alibaba Trade Guarantee. Q. How is the package of goods? Delivery methods?A.1. Standard export fumigation sign wooden box packaging2. Express, air, sea shipping according to customer requirements, find the most suitable way.also accept LC at sight.
Battery Internal Resistance Tester Portable Battery Cell Resistance Tester Digital Handheld Impedance Tester Battery Analyzer Battery Test Equipment
After-sales Service: 1 Year
Warranty: 1 Year
Type: Storage Battery Tester
Test Region: Charge and Discharge
Application: Lead-acid Battery
General Information HDGC3918 Battery Tester with AC discharge measurement method is used to measure the voltage and Conductance of battery, which can judge the capacity and state of heath of battery .The measurement data can be read on the instrument display directly. And it can also be uploaded to PC simply by USB drive. With the analysis software, you could not only keep a record of the testing result but also have analyzed for the status of batteries in different testing conditions.Features Intelligent, hand-held and easy-to-useColorful touch screen with optional operations of keyboard and touch screenSimultaneously test for voltage, conductance Fast testing for single cell and multi-cells in seconds with testing data auto savingStrong anti-interference in high current with stable and accurate performance Direct USB drive for software update and data transfer to PC for further analyzingPowerful PC management software, convenient for data storage, analyzing and report printing Build-in reference value and self-defined value for comparison of testing result Technical Parameter Measurement Range Conductance: 100~19,990SVoltage: 0.000v--16vMin Measurement Resolution Conductance: 0.001SVoltage:1mVMeasurement Accuracy Conductance: ±1%rdg ±6dgtVoltage: ±0.2%rdg ±6dgtPower Supply Li-ion batteryWorking Time More than 8 hoursMeasurement data memory Storage >3000 cellsDisplay 5 inch touch screen . Dimension 220 x 170 x 60mmWeight 1kg
3.2V/3.7V LiFePO4/Nca/Ncm 100ah-300ah Large Cylindrical/Prismatic Lithium Battery Automatic Charge Discharge Capacity Analyzer Tester
After-sales Service: Lifelong Aftersale Service
Warranty: 12 Months
Type: Storage Battery Tester
Test Region: Charge and Discharge
Application: Lithium-ion Battery
Description:Lithium Battery Auto Cycle Charge Discharge Tester DT5050 can be used for the capacity test, charge characteristic test, capacity grading and matching, balance maintenance, internal resistance test of various types of Li-ion Batteries, Ni-MH Batteries, Ni-CD Batteries. It can be compatible with cylindrical, pouch and prismatic cells. The isolation channel testing design can determine the location of the defective cells without disassembly the battery pack. Each isolation channel can independently charge and discharge the battery, maintain the balance of the battery pack, and restore the unbalanced battery pack to a normal balance level. It's suitable for large lithium battery testing, maintenance, battery pack assembly and EV battery repair, etc. Lithium Battery Auto Cycle Charge Discharge TesterModel No.: DT5050 Applicable Batteries: Features:• Each channel is equipped with a dedicated processor to ensure a perfect level of capacity calculation, timing, voltage and current control.• All channel is under isolated test; it can directly test the cells of the battery pack.• Independent heat source channel, temperature control and speed regulation fan.• The LED light indicates the running status, testing status, matching status, alarm status.• Fully compatibility with the batteries of Li-ion, Polymer, Ni-MH, NiCd, and so on.• Fully compatible installation with cylindrical, pouch, prismatic batteries.• Online test between computer and device, the setting and results is particular and plentiful,• With the work steps of Constant Current Discharge, Constant Power Discharge, Constant Resistance Discharge, Constant Current Charge, Constant Voltage Charge, Constant Current & Voltage Charge, Internal Resistance Test and Idle, etc.• Work step automatically switching.• The charge and discharge parameters can be customized.• The matching can be processed, the test results can be matched according to the customized standard, and it can mark and display on the device. • The recording function of the test process• With 3 Y-axis (voltage, current, capacity) and a time axis curve drawing ability, and data report function. • The color of the test status bar is customized, which makes it easy to check the test status of all devices when the number of tests is large.• The battery temperature monitoring and control management system can be installed upon request to realize safe unattended charging.Technical Specification Model No.: DT5050Input Voltage:AC 220V± 10% 50Hz/60HzInput Power: No-load 80W, full load 1650WVoltageMax. Charge Constant Voltage:5VMin. Discharge Cut-off Voltage:1VTolerance:0.02VCurrentMax. Charge Current:50AMax. Discharge Current:50AMin. Charge Cut-off Current0.05ATolerance:0.02APowerMax. Output Power (Single Channel)200WData RecordingData Recording ConditionsTime intervalVoltage intervalCurrent intervalChargeCharge Modes:Constant current chargeConstant voltage chargeConstant current & voltage chargeCharge Cut-off Conditions:Voltage, current, time, capacity, -△VDischargeDischarge Modes:Constant current dischargeConstant power dischargeConstant resistance dischargeDischarge Cut-off Conditions: Voltage, current, time, capacityCycleCycle Index:1-9999 timesProtectionPower-down protectionReverse connectionOver-temperature protectionOver-voltage protectionShort-circuit protectionExpand functionalityBattery temperature monitoring and control systemIP GradeIP20Channel Control ModeIndependent controlHigh Voltage Insulation Between ChannelsAC1000V/2min NormalVoltage & Current Test Sampling4 core wires connectionNoise< 76 dBHost Computer Communication Methodbased on TCP/IP protocolTest Report Output MethodExcelServer Disk Configuration>100GBServer Operation SystemWindows XP, Windows 7/8/10Communication PortLAN Equipment Work Ambient ConditionsOperation Ambient Temperature0 ºC - 40 ºCStorage Temperature-10 ºC - 50 ºCOperation Ambient Humidity≤ 70 % RH (No condensation)Storage Ambient Humidity≤ 80 % RH (No condensation)Illustrations:Packing Information:Produce Size: 67.5*34*23.5cm(L*W*H)Pcs/Ctn: 1 pc/ctnPackage Size: 77*46*29.5 cm(L*W*H)G.W.: 24.00 kgsN.W.: 22.00 kgsBattery Connection 1. Applicable Batteries:The DT5050 supports batteries with the voltage <5V and the capacity < 300AH, in the physical specification, it supports cylindrical, pouch, prismatic batteries. 2. The connection of the pouch cells & prismatic cellsDifferent clamp styles are available for different battery polarity structures3. The connection of cylindrical cellsThe cylindrical cell test bracket is optional upon the request for the connection to the cylindrical cell. Schematic Diagram of Upper Computer ConnectionAbout us:Founded in 2005, DEKANG is a high-tech enterprise involved in researching & development, production and sales of Storage Battery Measuring & Maintenance Equipment, EV Charging Station, Shared Power Swapping Station, Shared Mobility Solution. We provide the clients with the complete solution of storage battery service.Products Category:Battery Charging & Discharging TesterBattery Testing and Recovery EquipmentLithium Battery Intelligent ChargerE-Bike/E-scooter Charging StationShared Battery Charging & Swapping SystemIntelligent Lithium BatteriesBattery-swapping E-bike/E-scooter and so on.Why choose us?Beginning from 2005, we have achieved the leadership of our industrialOver 15 years of experiences Powerful function and superior performanceProfessional and strong R&D team.Technical leadership and advantageAdvanced production technology and automatic assembly lineMarket verification and specialized users approval from over 50 countriesRich experience in market operationProfessional after-sale service, lifelong after-sale service providedDeliverySample order dispatched by express via DHL, FEDEX,TNT,UPS or any other express services you prefer to, also we can coordinate to send it to other agreed address in China for loading with your convenienceNormal order delivered by sea or air as per your instructions.Equipment operation training & guidanceIn addition to providing user manual and operation videos, after you purchase the equipment, we will also provide operation training and guidance support through telephone, email, video connection, remote connection and other ways, so as to ensure that you are proficient in the operation and use of the equipment. Our equipment is intelligent in design, rich in functions and easy to operate. Make it easy for you to operate.Warranty:12-month warranty, lifelong after-sale service and free technology service.After-sales serviceVery important: DEKANG exporting division is the only official exporting department of DEKANG. Anyone who obtains our equipment from a third party or through other channels may have the risk of not being able to obtain perfect after-sales & technology service. In order to enjoy better service and technology support, overseas users please purchase directly from the official exporting department of DEKANG..Free replacement parts will be provided during the warranty period, and we will dispatch the replacement parts to the user by DHL, UPS, TNT or FEDEX at our account and guide the user to replace via phone, email or video. The modular design of our equipment makes it easy to install and replaceAfter the warranty period, the cost of replacement parts will be charged. If you pay for the replacement parts, you can enjoy a free warranty within half a year from the maintenance date for the same problem.Lifelong free technology service provided by us, the users can advise malfunction and inquire the maintenance technology through the telephone, fax, email, and social media, etc.Paid service The conditions below are not included in the free maintenance range, the company provide the paid service, kindly note:Do not operate or use as per the manual and cause the damageThe instrument was disassembled or repaired by the non-authorized person by our companyUnexpected factors or man-made causes the damage, such as the water inflowing, mechanical damage, falling, burning and so on.