- electric bell alarm system
- • система электрической звуковой сигнализации• система электрической тревожной звонковой сигнализации
Англо-русский железнодорожный словарь. 2013.
electric bell alarm system
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Burglar alarm — Silent alarm redirects here. For the album, see Silent Alarm (album). Burglar (or intrusion), fire and safety alarms are all electronic today. Sensors are connected to a control unit via a low voltage hardwire or narrowband RF signal which is… … Wikipedia
fire alarm — 1. a signal that warns that a fire has started. 2. a bell, buzzer, siren, horn, etc., that provides such a signal. [1840 50, Amer.] * * * means of warning in case of fire. Originally, watchmen provided the only fire alarm system, but, with… … Universalium
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Operating system — Operating systems … Wikipedia
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