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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. LS9 Biometric Door Access Control Lock Fingerprint Password Lock Digital Code Keyless Smart Entry
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    LS9 Biometric Door Access Control Lock Fingerprint... SKU : 32901355828
    Special Price US$142.25 Regular Price US$158.05
    Out of stock
  2. 125kHz Single Door Wiegand Input and Output Muti-Fuction RFID Access Control with Touch Screen Keypad
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    125kHz Single Door Wiegand Input and Output Muti-F... SKU : NORDS10092217
    Special Price US$16.70 Regular Price US$18.55
  3. WiFi NFC Card Reader Facial Recognition Terminal with Wall Bracket
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    WiFi NFC Card Reader Facial Recognition Terminal w... SKU : WCAM101119340535
    Special Price US$163.34 Regular Price US$181.49
  4. Wireless 8 Inch Touch Screen MIFARE Card Reader Face Scanner
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    Wireless 8 Inch Touch Screen MIFARE Card Reader Fa... SKU : WCAM101119340534
    Special Price US$163.34 Regular Price US$181.49
  5. Public Place Hospital Entrance Gate Turnstile Linux Facial Recognition System
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    Public Place Hospital Entrance Gate Turnstile Linu... SKU : WCAM101119340603
    Special Price US$163.34 Regular Price US$181.49
  6. DIYSECUR Full Complete Fingerprint And Id Card Door Access Control System +Drop Bolt Lock + Remote C
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    DIYSECUR Full Complete Fingerprint And Id Card Doo... SKU : 1291125498
    Special Price US$167.36 Regular Price US$185.96
    Out of stock
  7. Xiaomi Aqara Mijia Smart Door Touch Lock ZigBee Keyless Fingerprint Password 4in1 Mi Home App Contro
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    Xiaomi Aqara Mijia Smart Door Touch Lock ZigBee Ke... SKU : 32869842537
    Special Price US$198.77 Regular Price US$220.85
  8. Newest ACR39U Smart Card Reader Writer USB interface
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    Newest ACR39U Smart Card Reader Writer USB interfa... SKU : ACR39
    Special Price US$16.70 Regular Price US$18.55
  9. Face Reader with Doorbell
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    Face Reader with Doorbell SKU : WCAM101119340541
    Special Price US$103.71 Regular Price US$115.23
  10. Wireless 7" SIP IP Indoor Monitor for Access Control and Two Way Talk
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    Wireless 7" SIP IP Indoor Monitor for Access ... SKU : WCAM101119340553
    Special Price US$85.56 Regular Price US$95.07
  11. ZK IFACE702 Face And Fingerprint Time Attendance Door Access Control System WIFI TCP/IP
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    ZK IFACE702 Face And Fingerprint Time Attendance D... SKU : 32562282429
    Special Price US$124.83 Regular Price US$138.70
    Out of stock
  12. NVR Kit 4 CH for CCTV Security PoE IP Network
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    NVR Kit 4 CH for CCTV Security PoE IP Network SKU : SNH04P-20EAB30
    Special Price US$166.58 Regular Price US$185.09
  13. Wireless/ Wired 5 Inch Door Sensor Facial Recognition Access Control System
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    Wireless/ Wired 5 Inch Door Sensor Facial Recognit... SKU : WCAM101119340597
    Special Price US$88.15 Regular Price US$97.95
  14. Wireless 5 Inch Company and Office Face Access Control System
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    Wireless 5 Inch Company and Office Face Access Con... SKU : WCAM101119340575
    Special Price US$85.56 Regular Price US$95.07
  15. Time Attendance Face Recognition Unit
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    Time Attendance Face Recognition Unit SKU : WCAM101119340539
    Special Price US$73.46 Regular Price US$81.62
  16. 4.3 Inch Touch Screen Face Detection Reader
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    4.3 Inch Touch Screen Face Detection Reader SKU : WCAM101119340537
    Special Price US$73.46 Regular Price US$81.62
  17. 8 Inch Touch Screen Biometric Security Camera Face Recognition Door Access System with IC Card and WiFi
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    8 Inch Touch Screen Biometric Security Camera Face... SKU : WCAM101119340559
    Special Price US$129.64 Regular Price US$144.04
  18. TCP/IP Color Screen Biometric Fingerprint And RFID Card Reader Door Access Control System Standalone
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    TCP/IP Color Screen Biometric Fingerprint And RFID... SKU : 32711738315
    Special Price US$29.46 Regular Price US$32.74
    Out of stock
  19. Electronic Keyless Lock Optical Fingerprint Password Door Lock Home Access Control System Security
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    Electronic Keyless Lock Optical Fingerprint Passwo... SKU : 32925607835
    Special Price US$65.32 Regular Price US$72.58
    Out of stock
  20. Newest version proxmark3 develop suit 3 Kits proxmark nfc RFID reader copier changeable card mfoc ca
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    Newest version proxmark3 develop suit 3 Kits proxm... SKU : 32657089273
    Special Price US$64.82 Regular Price US$72.02
  21. Audio interface RFID HF 14443A NFC mini reader writer 0 5M for Android mobile phone +SDK
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    Audio interface RFID HF 14443A NFC mini reader wri... SKU : RH06
    Special Price US$43.55 Regular Price US$48.38
  22. Face Recognition Reader Access Control Time Attendance
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    Face Recognition Reader Access Control Time Attend... SKU : WCAM101119340624
    Special Price US$88.15 Regular Price US$97.95
  23. Plastic Case Face Recognition Access Control Terminal 5 Inches Wg Access Control Camera System
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    Plastic Case Face Recognition Access Control Termi... SKU : WCAM101119340571
    Special Price US$358.66 Regular Price US$398.51
  24. Blue Iris Compatible VoIP SIP IP Video Doorphone Intercom Intercom for Two Way Talk and Remote Door Open
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    Blue Iris Compatible VoIP SIP IP Video Doorphone I... SKU : WCAM101119340595
    Special Price US$116.67 Regular Price US$129.64
  25. Free shipping UHF RFID reader module USB interface with uart UHF Passive 6C UHF reader module SDK+ME
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    Free shipping UHF RFID reader module USB interface... SKU : 32858002722
    Special Price US$85.56 Regular Price US$95.07
  26. Biometric Fingerprint Recognition Device RFID Card Password Door Lock Access Control Keypad
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    Biometric Fingerprint Recognition Device RFID Card... SKU : BST-D1
    Special Price US$21.05 Regular Price US$23.39
    Out of stock
  27. Smart Door Lock Home Keyless Lock Fingerprint Password Work Electronic Lock Wireless App Phone Bluet
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    Smart Door Lock Home Keyless Lock Fingerprint Pass... SKU : 32955168941
    Special Price US$32.66 Regular Price US$36.29
    Out of stock
  28. Xiaomi Aqara Smart Door Touch Lock ZigBee Connection For Home Security Fingerprint Unlock APP Anti-P
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    Xiaomi Aqara Smart Door Touch Lock ZigBee Connecti... SKU : 32867533788
    Special Price US$237.66 Regular Price US$264.07
  29. Plug and Play Hospital School Use Fever Detection Temperature Detector
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    Plug and Play Hospital School Use Fever Detection ... SKU : WCAM101119340525
    Special Price US$33.71 Regular Price US$37.45
  30. DIYSECUR Full TCP / IP Fingerprint ID Card Reader Door Access Control Kit + Magnetic Lock + Exit
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    DIYSECUR Full TCP / IP Fingerprint ID Card Reader ... SKU : 1290724467
    Special Price US$149.50 Regular Price US$166.11
    Out of stock
  31. All in One Industrial Grade Touch Panel PC Front IP65 Rk3128 Mini Android PC Rugged Industrial Tablet PC with RJ45
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    All in One Industrial Grade Touch Panel PC Front I... SKU : SENKE101118570026
    Special Price US$108.72 Regular Price US$120.80
  32. Aluminum Alloy Built in Gpio RS485 Quad Core 1.8GHz Rk3288 Rk3399 Android Fanless Industrial Computer 12V
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    Aluminum Alloy Built in Gpio RS485 Quad Core 1.8GH... SKU : SENKE101118570021
    Special Price US$161.61 Regular Price US$179.57
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