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词汇 photocell
释义

photocell

noun
/ˈfəʊtəʊsel/
/ˈfəʊtəʊsel/
(also photoelectric cell)
  1. an electric device that uses a stream of light. When the stream is broken it shows that somebody/something is present, and can be used to control alarms, machines, etc.光电池;光电感应器;光电管Topics Engineeringc2
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