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Search results for: 'Explain the difference between "hard" and "soft" water and how it is measured.'

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  1. uhf rfid module R2000 chip smart card read module USB 2.0 RS232 interface with four antenna ports fo
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    uhf rfid module R2000 chip smart card read module ... SKU : CFR2000
    Special Price US$238.53 Regular Price US$265.04
  2. RFID Qr Code High Temper Alarm Detection Face Recognition Temperature Attendance
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    RFID Qr Code High Temper Alarm Detection Face Reco... SKU : WCAM101119340596
    Special Price US$272.24 Regular Price US$302.49
  3. Touch Key 7" LCD Fingerprint Video Door Phone Intercom System Doorbell With fingerprint access
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    Touch Key 7" LCD Fingerprint Video Door Phone... SKU : 32718324622
    Special Price US$125.99 Regular Price US$139.99
    Out of stock
  4. Free Shipping Touch Key 7" LCD Fingerprint Video Door Phone Intercom System With fingerprint access
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    Free Shipping Touch Key 7" LCD Fingerprint Vi... SKU : 32718280912
    Special Price US$125.99 Regular Price US$139.99
    Out of stock
  5. Fast Dispatch Face Recognition Electric Access Control Control Lift Device
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    Fast Dispatch Face Recognition Electric Access Con... SKU : WCAM101119340563
    Special Price US$85.56 Regular Price US$95.07
  6. Smart Security Devices Biometric Recorder Face Recognition Time Attendance System Elevator Access Control
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    Smart Security Devices Biometric Recorder Face Rec... SKU : WCAM101119340562
    Special Price US$85.56 Regular Price US$95.07
  7. DIYSECUR TCP/IP USB Fingerprint ID Card Reader Password Keypad Door Access Control System + Power
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    DIYSECUR TCP/IP USB Fingerprint ID Card Reader Pas... SKU : 32788518520
    Special Price US$55.16 Regular Price US$61.28
    Out of stock
  8. 4.3 Inch Low Price Video Intercom RFID Card Face Recognition Access Control Device
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    4.3 Inch Low Price Video Intercom RFID Card Face R... SKU : WCAM101119340560
    Special Price US$129.64 Regular Price US$144.04
  9. Face Recognition with temperature detection
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    Face Recognition with temperature detection SKU : temperature-detection
    Special Price US$79.84 Regular Price US$88.71
  10. Support WiFi and Bluetooth Gate Open Face Recognition Door Access Control
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    Support WiFi and Bluetooth Gate Open Face Recognit... SKU : WCAM101119340502
    Special Price US$142.60 Regular Price US$158.45
  11. Facial Recognition Big Size Screen Live Scan Multi- 3D Face Time Biometric Products for Attendance and Access Control
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    Facial Recognition Big Size Screen Live Scan Multi... SKU : WCAM101119340493
    Special Price US$142.60 Regular Price US$158.45
  12. Remote Access System with Cloud Server Data Central Attendance Biometric Devices Work Time Attendance and Door Access Control
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    Remote Access System with Cloud Server Data Centra... SKU : WCAM101119340491
    Special Price US$142.60 Regular Price US$158.45
  13. EPC GEN2 uhf rfid writer module with TTL Interface Read range more than 15m connect with 12dBi anten
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    EPC GEN2 uhf rfid writer module with TTL Interface... SKU : CFMU903
    Special Price US$75.19 Regular Price US$83.54
  14. WiFi None Screen Face Recognition Access Controller
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    WiFi None Screen Face Recognition Access Controlle... SKU : WCAM101119340543
    Special Price US$57.92 Regular Price US$64.35
  15. USB Password Lock Security Biometric Fingerprint Scanner Reader Portable Safety Analyzer Universal f
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    USB Password Lock Security Biometric Fingerprint S... SKU : 32882129302
    Special Price US$19.00 Regular Price US$21.12
  16. Wholesale Single Door Fingerprint and RFID Card Access Control System & Time Attendance Kits
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    Wholesale Single Door Fingerprint and RFID Card Ac... SKU : 811879024
    Special Price US$172.85 Regular Price US$192.05
  17. Gate Control Time Attendance Gate Face Recognition Machine Biometric Device
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    Gate Control Time Attendance Gate Face Recognition... SKU : WCAM101119340551
    Special Price US$85.56 Regular Price US$95.07
  18. Access Control Low Price Video Intercom RFID Card Face Recognition Access Control Device
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    Access Control Low Price Video Intercom RFID Card ... SKU : WCAM101119340549
    Special Price US$85.56 Regular Price US$95.07
  19. Using Linux Operating System Temperature Detection Face Recognition System
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    Using Linux Operating System Temperature Detection... SKU : WCAM101119340629
    Special Price US$250.63 Regular Price US$278.48
  20. High Accuracy Access Control NFC Card Reader Facial Recognition System
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    High Accuracy Access Control NFC Card Reader Facia... SKU : WCAM101119340628
    Special Price US$250.63 Regular Price US$278.48
  21. Second Development Linux System Android 8 Inch Touch Screen Bare Machine
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    Second Development Linux System Android 8 Inch Tou... SKU : WCAM101119340633
    Special Price US$172.85 Regular Price US$192.05
  22. Free API Rockchip Rk3568 Face Access 8-Inch Touch Screen Android Bare Machine Face Reader with Qr and Ncf Card Reader
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    Free API Rockchip Rk3568 Face Access 8-Inch Touch ... SKU : WCAM101119340632
    Special Price US$172.85 Regular Price US$192.05
  23. Touch Screen Facial Recognition 64 Floors Elevator Access Control System
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    Touch Screen Facial Recognition 64 Floors Elevator... SKU : WCAM101119340554
    Special Price US$85.56 Regular Price US$95.07
  24. Human Head Non-Contact Entrance Guard Infrared Head Temperature Mask Detection Scan Time Attendance Access Control Terminal
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    Human Head Non-Contact Entrance Guard Infrared Hea... SKU : WCAM101119340594
    Special Price US$272.24 Regular Price US$302.49
  25. JSJ N86-900 heightening thick bottom box 86 can be surface mounted and concealed module
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    JSJ N86-900 heightening thick bottom box 86 can be... SKU : 32731191484
    Special Price US$1.16 Regular Price US$1.29
    Out of stock
  26. Free Shipping Brand New USB Fingerprint Reader Scanner Sensor ZK4500 for Computer PC Home and Office
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    Free Shipping Brand New USB Fingerprint Reader Sca... SKU : 32811911702
    Special Price US$50.52 Regular Price US$56.14
  27. Wireless RFID Facial Recognition Elevator Entry System with Elevator Access Control Panel
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    Wireless RFID Facial Recognition Elevator Entry Sy... SKU : WCAM101119340567
    Special Price US$224.70 Regular Price US$249.67
  28. Keyless Electronic Door Lock Invisible Intelligent Lock With Remote Control & Fingerprint Touch
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    Keyless Electronic Door Lock Invisible Intelligent... SKU : 32904896790
    Special Price US$105.82 Regular Price US$117.57
    Out of stock
  29. Danmini A3 sliver fingerprint reader biometric door lock with thumbprint scanner DC 5V/1A color TFT
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    Danmini A3 sliver fingerprint reader biometric doo... SKU : 32839005533
    Special Price US$21.63 Regular Price US$24.03
    Out of stock
  30. Free SDK uru 4000b Digital Persona USB Biometric Fingerprint sensor Fingerprint Reader URU4000B scan
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    Free SDK uru 4000b Digital Persona USB Biometric F... SKU : 32353252060
    Special Price US$50.12 Regular Price US$55.69
  31. Good Quality High Speed Face Time Attendance Face recognition Time Clock With Fingerprint Door Acces
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    Good Quality High Speed Face Time Attendance Face ... SKU : 32884175790
    Special Price US$36.29 Regular Price US$40.32
    Out of stock
  32. Electronic Intelligent Bluetooth Fingerprint Password Padlock Home Door App Remote Management Mobile
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    Electronic Intelligent Bluetooth Fingerprint Passw... SKU : 32960172665
    Special Price US$13.65 Regular Price US$15.16
    Out of stock
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