📖 Определения и значения для слова photocell
📒 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.
🔗 Ссылки:
📒 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.