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G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B13/00—Burglar, theft or intruder alarms
G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Circuit Arrangement For Electric Light Sources In General
(AREA)
Dispositif de reglage reagissant a au moins une influence de l'environnement pour le couvercle dispose de facon rabattable d'une lucarne de toit, en particulier pour une coupole transparente
Procede et dispositif pour la regulation automatique du debit de la ventilation mecanique controlee d'une installation de chauffage electrique integre