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Fuse or circuit breaker status indicator
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Syst me de limitation de courant d fectueux
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Closed circuit fire and burglar alarm
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Improvements in or relating to alarm signal installations
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Electrical protective alarm system
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Appareil de diagnostic pour systeme d'alarme
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Supervised signaling system
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電源保護回路
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Indicator to show whether a switch has opened
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Electric lighting installation
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Supervised electric alarm system
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Alarm system
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Combined burglar and fire alarm device
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Устройство для многоканальной сигнализации
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Annunciator system with circuitry producing an output alarm signal for a discontinuous lamp
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Устройство дл автоматического включени запасных предохранителей оперативных цепей
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Faulty circuit alarm
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Fire alarm system
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Supervised electric system
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Устройство для сигнализации о пожаре
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Устройство для охраны объекта
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Auxiliary fire-alarm |
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Burglar alarm system
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