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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. 1Pc Universal Digital Smart Door Lock Password Fingerprint Anti-theft Security Electric Lock House
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    1Pc Universal Digital Smart Door Lock Password Fin... SKU : 32969027580
    Special Price US$43.26 Regular Price US$48.06
    Out of stock
  2. Free Software Mask Detection Door Sensor SIP Access Control Door Open Linux 5 Inch Face Reader System
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    Free Software Mask Detection Door Sensor SIP Acces... SKU : WCAM101119340619
    Special Price US$87.29 Regular Price US$96.99
  3. 7 Inch Free API Management Software Face Recognition Unit
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    7 Inch Free API Management Software Face Recogniti... SKU : WCAM101119340623
    Special Price US$133.96 Regular Price US$148.84
  4. Black/White List Free Software Face Recognition Time Attendance Access Control System
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    Black/White List Free Software Face Recognition Ti... SKU : WCAM101119340591
    Special Price US$87.29 Regular Price US$96.99
  5. Waterproof HD 720P Wireless WIFI RFID Password Fingerprint Recognition Video Doorbell Intercom Access Control
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    Waterproof HD 720P Wireless WIFI RFID Password Fin... SKU : MJFR11-2
    Special Price US$133.18 Regular Price US$147.98
  6. Anytek P4 USB Rechargeable Smart Fingerprint Lock Keyless Fingerprint Unlock Anti-Theft Security Pad
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    Anytek P4 USB Rechargeable Smart Fingerprint Lock ... SKU : 32965350294
    Special Price US$18.87 Regular Price US$20.97
    Out of stock
  7. Mountainone Waterproof HD720P Wireless WIFI RFID Password Fingerprint Recognize Video Door Phone Doo
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    Mountainone Waterproof HD720P Wireless WIFI RFID P... SKU : MJFR11
    Special Price US$112.35 Regular Price US$124.84
  8. Waterproof IP68 Wiegand Ouput Metal Single Door RFID Access Control with Luminous Keypad
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    Waterproof IP68 Wiegand Ouput Metal Single Door RF... SKU : NORDS10092216
    Special Price US$26.71 Regular Price US$29.68
  9. Embedded or Wall Mount Aluminum Case IP65 Waterproof LCD Monitor Fanless 12" Industrial Tablet PC
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    Embedded or Wall Mount Aluminum Case IP65 Waterpro... SKU : SENKE101118570027
    Special Price US$194.50 Regular Price US$216.11
  10. Linux Ubuntu X86 Iot IP65 Waterproof LCD Display Fanless Tugged Tablet 12.1 Inch Industrial Panel PC
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    Linux Ubuntu X86 Iot IP65 Waterproof LCD Display F... SKU : SENKE101118570020
    Special Price US$222.08 Regular Price US$246.76
  11. Embedded or Vesa Mount RS232 RS485 IP65 Waterproof Front Panel 1024X768 Fanless Industrial Touch PC Metal
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    Embedded or Vesa Mount RS232 RS485 IP65 Waterproof... SKU : SENKE101118570019
    Special Price US$214.33 Regular Price US$238.15
  12. Fully Enclosed IP65 Water Proof Fanless Embedded Wall Mounted Industrial Panel PC Touch Screen 12 Inch
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    Fully Enclosed IP65 Water Proof Fanless Embedded W... SKU : SENKE101118570015
    Special Price US$217.79 Regular Price US$241.99
  13. IP65 Waterproof 15 Inch Capacitive Touchscreen J4125 4GB 128GB DC 12V Fanless Industrial Touch Panel PC
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    IP65 Waterproof 15 Inch Capacitive Touchscreen J41... SKU : SENKE101118570011
    Special Price US$283.05 Regular Price US$314.50
  14. IP65 Waterproof Front Panel 10.4 12.1 15 Inch DDR3 4G 128g 3558u I3 3th 4th RS232 Touch Screen Industrial Panel PC
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    IP65 Waterproof Front Panel 10.4 12.1 15 Inch DDR3... SKU : SENKE101118570001
    Special Price US$271.37 Regular Price US$301.53
  15. Metal Waterproof RFID 13.56MHz Card Reader PIN Code Keypad Door Access Controller
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    Metal Waterproof RFID 13.56MHz Card Reader PIN Cod... SKU : TB15000ACWPIC
    Special Price US$23.23 Regular Price US$25.81
  16. Metal Waterproof RFID 125MHz Card Reader PIN Code Keypad Door Access Controller
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    Metal Waterproof RFID 125MHz Card Reader PIN Code ... SKU : TB15000ACWP
    Special Price US$17.42 Regular Price US$19.35
  17. 7 Inch Mini Touch Screens Tablet IP65 Waterproof All in One Fanless Industrial Panel Computer PC
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    7 Inch Mini Touch Screens Tablet IP65 Waterproof A... SKU : SENKE101118570029
    Special Price US$166.80 Regular Price US$185.33
  18. Original Xiaomi Mi Cube Controller Zigbee Version Controlled by Six Actions with Phone App for Smart
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    Original Xiaomi Mi Cube Controller Zigbee Version ... SKU : 32810263920
    Special Price US$18.50 Regular Price US$20.56
  19. Good Quality ZK Access Control Card Reader Wiegand34 MF Card IC Card Reader IP64 Waterproof Smart Ca
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    Good Quality ZK Access Control Card Reader Wiegand... SKU : 32661396700
    Special Price US$21.61 Regular Price US$24.01
  20. Door Management Intercom Face Identification Waterproof Facial Recognition Time Attendance with Access Control Function
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    Door Management Intercom Face Identification Water... SKU : WCAM101119340497
    Special Price US$232.25 Regular Price US$258.05
  21. Facial Communication with TCP IP Time Attendance WiFi Recognition Card Reader Access Control Keypad Face Capacity Waterproof
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    Facial Communication with TCP IP Time Attendance W... SKU : WCAM101119340496
    Special Price US$142.60 Regular Price US$158.45
  22. V9 IC Fingerprint Touch Screen Password Entrance Anti-theft Door Electronic Smart Lock Red bronze/K
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    V9 IC Fingerprint Touch Screen Password Entrance A... SKU : 32857758037
    Special Price US$555.59 Regular Price US$617.32
  23. 4G WiFi Qr RFID Touch Screen Face Access Terminal Unit for School Bus
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    4G WiFi Qr RFID Touch Screen Face Access Terminal ... SKU : WCAM101119340638
    Special Price US$142.60 Regular Price US$158.45
  24. High Accuracy 140dB WDR Water-Proof Nigth Version Vehicle Plates Recogntion Camera
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    High Accuracy 140dB WDR Water-Proof Nigth Version ... SKU : WCAM101119340590
    Special Price US$337.06 Regular Price US$374.51
  25. IP43 waterproof RFID keypad standalone access control board 125KHz smart lock card reader for door a
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    IP43 waterproof RFID keypad standalone access cont... SKU : 32817514160
    Special Price US$18.29 Regular Price US$20.32
  26. IP65 Waterproof Access Control System Kit Set Of RFID Card Reader Keypad With Electric Lock+Power Su
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    IP65 Waterproof Access Control System Kit Set Of R... SKU : 32849064406
    Special Price US$96.07 Regular Price US$106.74
  27. LANXSTAR Fingerprint RFID Card Password Keys APP 5 in 1 Smart Lock Slide Cover Anti-theft Door Lock
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    LANXSTAR Fingerprint RFID Card Password Keys APP 5... SKU : 32681526570
    Special Price US$300.38 Regular Price US$333.75
  28. 5 Inch SIP Dynamic Face Recognition Access Control System TCP/IP Time Attendance Solutions
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    5 Inch SIP Dynamic Face Recognition Access Control... SKU : WCAM101119340635
    Special Price US$95.07 Regular Price US$105.63
  29. DIYSECUR Full Complete LCD Fingerprint And Id Card Reader Password Keypad Door Access Control System
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    DIYSECUR Full Complete LCD Fingerprint And Id Card... SKU : 2039616781
    Special Price US$167.36 Regular Price US$185.96
    Out of stock
  30. DANMINI A5 Fingerprint sensor Employee Attendance Machine Time Clock Recorder 2.4-Inch TFT Color
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    DANMINI A5 Fingerprint sensor Employee Attendance ... SKU : 32846070061
    Special Price US$72.29 Regular Price US$80.32
  31. Fingerprint Time Attendance Machine Access Control WIFI Indoor RFID 125KHz Password
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    Fingerprint Time Attendance Machine Access Control... SKU : MM7301
    Special Price US$65.32 Regular Price US$72.58
  32. ZK Multibio700 Face Access Control Door Controller With Fingerprint And RFID Card Reader 1500 Face C
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    ZK Multibio700 Face Access Control Door Controller... SKU : 32266908299
    Special Price US$101.61 Regular Price US$112.90
    Out of stock
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