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ELECTRONICS (Switches (Toggle (can be SPDT or DPDT), Push-button (fans),…

- - - - keypads
  - - - sensor
  - - - security circuits
- - - - environmental friendly
  - - - series
      - parallel
  - - - cost effective over long distance
  - - - required for most products
- - - - calculator
  - - - eg. air conditioning
- - - - silver
      - gold
      - most metals
  - - - wood
      - most plastics
  - - - silicon
      - germanium