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G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B17/00—Fire alarms; Alarms responsive to explosion
G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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FR1033341D1951-03-021951-03-02Circuit avertisseur d'incendie avec détecteurs de température maximum et de gradient de température
ExpiredFR1033341A
(fr)