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Вопрос № 237557 - Английский язык

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How does a break-a-beam sensor operate?
Варианты ответов
  • A break-a-beam sensor sends out a signal when a beam of light is interrupted.
  • A break-a-beam sensor is used to provide light-sensing capabilities.
  • When a safety condition is breached, a break-a-beam sensor prevents valves or electrical switches from working.
  • A break-a-beam sensor transmits a signal when personnel come into a specific area.
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Вопрос задал(а): Анонимный пользователь, 10 Ноябрь 2020 в 00:25
На вопрос ответил(а): Анастасия Степанова, 10 Ноябрь 2020 в 00:25

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Вопрос № 237561

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