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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. DC12V/24V Wall Mount Stainless Steel Door Stopper
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    DC12V/24V Wall Mount Stainless Steel Door Stopper SKU : NORDS101023460008
    Special Price US$9.87 Regular Price US$10.96
  2. DC12V/24V Wall Mount Magnetic Door Stopper
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    DC12V/24V Wall Mount Magnetic Door Stopper SKU : NORDS101023460007
    Special Price US$18.14 Regular Price US$20.16
  3. DC12V/24V Wall Mount Sliding Door Stopper Holder
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    DC12V/24V Wall Mount Sliding Door Stopper Holder SKU : NORDS101023460006
    Special Price US$4.07 Regular Price US$4.52
  4. Wall Mount Door Contact Magnetic Door Holder with Ultra Low Power Consumption
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    Wall Mount Door Contact Magnetic Door Holder with ... SKU : NORDS101023460005
    Special Price US$4.07 Regular Price US$4.52
  5. Standard Open Magnets Extended Wall Mount Magnetic Door Holder
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    Standard Open Magnets Extended Wall Mount Magnetic... SKU : NORDS101023460004
    Special Price US$9.87 Regular Price US$10.96
  6. Standard Electromagnetic Door Holder with Ultra Low Power Consumption
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    Standard Electromagnetic Door Holder with Ultra Lo... SKU : NORDS101023460003
    Special Price US$5.81 Regular Price US$6.45
  7. DC12V/24V Wall Mount Door Holder Door Stopper
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    DC12V/24V Wall Mount Door Holder Door Stopper SKU : NORDS101023460002
    Special Price US$18.29 Regular Price US$20.32
  8. DC12V/24V Wall Mount Door Holder Door Stopper
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    DC12V/24V Wall Mount Door Holder Door Stopper SKU : NORDS10092236
    Special Price US$18.14 Regular Price US$20.16
  9. Original xiaomi Mijia aqara Smart door lock ,Digital Touch Screen Keyless Fingerprint+Password work
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    Original xiaomi Mijia aqara Smart door lock ,Digit... SKU : 32836642835
    Special Price US$336.97 Regular Price US$374.41
  10. RFID 125KHz Based Access Control + Time Attendance + Fingerprint + PIN +Keypad TFT Color Display Standalone TCP/IP
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    RFID 125KHz Based Access Control + Time Attendance... SKU : H15U
    Special Price US$48.61 Regular Price US$54.02
  11. Face Recognition PCB Elevator Board Access Control
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    Face Recognition PCB Elevator Board Access Control SKU : WCAM101119340568
    Special Price US$172.85 Regular Price US$192.05
  12. RS485 Elevator Access Control Board Facial Recognition Access Control System
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    RS485 Elevator Access Control Board Facial Recogni... SKU : WCAM101119340555
    Special Price US$172.85 Regular Price US$192.05
  13. 2pcs 2 Inch Door Lock Latch Slide Barrel Bolt Clasp Locker Silver
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    2pcs 2 Inch Door Lock Latch Slide Barrel Bolt Clas... SKU : 32882861661
    Special Price US$0.65 Regular Price US$0.73
    Out of stock
  14. Stainless Steel Door Safety Guard Chain Security Bolt Locks Cabinet Latch DIY Home Tools Gold Silver
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    Stainless Steel Door Safety Guard Chain Security B... SKU : 32905374739
    Special Price US$1.28 Regular Price US$1.42
    Out of stock
  15. Security Engineering Anti-fire ABS shell Padlock Pure Copper Core Door Safety Lock keyed padlock
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    Security Engineering Anti-fire ABS shell Padlock P... SKU : 32906087422
    Special Price US$1.74 Regular Price US$1.94
  16. 280kg 600lbs DC 12V/ 24V Wireless Smart Electromagnetic Lock Em Lock Door Lock for Glass Door Wooden Door
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    280kg 600lbs DC 12V/ 24V Wireless Smart Electromag... SKU : XNS280
    Special Price US$6.53 Regular Price US$7.26
  17. CCTV Security Solar Power Battery Surveillance CCTV Camera 4G PTZ
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    CCTV Security Solar Power Battery Surveillance CCT... SKU : SOLARCAM4G
    Special Price US$402.74 Regular Price US$447.49
  18. 4MP ptz camera bullet 1080P ip cameras outdoor ip66 video surveillance camera zoom 4X 960P ip camer
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    4MP ptz camera bullet 1080P ip cameras outdoor ip6... SKU : 32964677567
    Special Price US$125.98 Regular Price US$139.98
  19. Ultra HD H.265 8MP IR 100M IP Camera 4K PTZ Heavy Duty 30x Auto Zoom Starlight Motion detection onvi
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    Ultra HD H.265 8MP IR 100M IP Camera 4K PTZ Heavy ... SKU : 32874946350
    Special Price US$275.79 Regular Price US$306.43
  20. Surveillance Camera Access Control System Camera Fingerprint Attendance System
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    Surveillance Camera Access Control System Camera F... SKU : WCAM101119340579
    Special Price US$87.29 Regular Price US$96.99
  21. Face Recognition Attendance Machine WiFi Door Access Control System Facial Recognition Timekeeper
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    Face Recognition Attendance Machine WiFi Door Acce... SKU : WCAM101119340578
    Special Price US$87.29 Regular Price US$96.99
  22. 5 Inch IPS Screen Face Recognition Attendance Sensor Smart Access Control System
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    5 Inch IPS Screen Face Recognition Attendance Sens... SKU : WCAM101119340577
    Special Price US$87.29 Regular Price US$96.99
  23. 5 Inch Non Touch SIM Card Biometric Attendance Machine Based Facial Recognition System Time Attendance for Cloud Develop
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    5 Inch Non Touch SIM Card Biometric Attendance Mac... SKU : WCAM101119340569
    Special Price US$87.29 Regular Price US$96.99
  24. Wiegand Protocol WiFi 4.3 Inch Face Detection Attendance Biometric Machine
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    Wiegand Protocol WiFi 4.3 Inch Face Detection Atte... SKU : WCAM101119340547
    Special Price US$85.56 Regular Price US$95.07
  25. PELCO-D/P Protocol Lens Decoder lens IR light wipers 12V 2 way relay output Auxiliary relay
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    PELCO-D/P Protocol Lens Decoder lens IR light wipe... SKU : 32831756015
    Special Price US$8.24 Regular Price US$9.16
    Out of stock
  26. Home Security Spring Slide Bolt Window Door Automatic Latch Lock Self Closing
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    Home Security Spring Slide Bolt Window Door Automa... SKU : 32884640024
    Special Price US$1.24 Regular Price US$1.37
    Out of stock
  27. Security Pull Ring Spring Bounce Door Bolt Window Gate Aluminum Latch Lock G08 Drop ship
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    Security Pull Ring Spring Bounce Door Bolt Window ... SKU : 32791641796
    Special Price US$0.48 Regular Price US$0.54
  28. 4 Inch Indoor Outdoor CCTV Replacement Acrylic Clear Cover Surveillance Cameras Security Dome
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    4 Inch Indoor Outdoor CCTV Replacement Acrylic Cle... SKU : 32920253495
    Special Price US$1.59 Regular Price US$1.77
  29. 7 Inch Access Control Face Recognition Biometric Face Reader
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    7 Inch Access Control Face Recognition Biometric F... SKU : WCAM101119340598
    Special Price US$142.60 Regular Price US$158.45
  30. Lithium Battery Doorbell 4800 mAh WiFi Smart Video Door Phone with Tuya APP for Villa
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    Lithium Battery Doorbell 4800 mAh WiFi Smart Video... SKU : WCAM101119340317
    Special Price US$21.48 Regular Price US$23.87
  31. Wireless Smart Video Doorbell with Tuya APP for Villa
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    Wireless Smart Video Doorbell with Tuya APP for Vi... SKU : WCAM101119340316
    Special Price US$21.48 Regular Price US$23.87
  32. Topvico Dummy Camera PTZ Speed Dome Battery Powered Flicker Blink LED Fake Outdoor Surveillance
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    Topvico Dummy Camera PTZ Speed Dome Battery Powere... SKU : 32586848155
    Special Price US$13.20 Regular Price US$14.66
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