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Publication of FR723770ApublicationCriticalpatent/FR723770A/fr
F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
F16K35/00—Means to prevent accidental or unauthorised actuation
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FR723770D1931-10-011931-10-01Dispositif de sécurité pour appareils de chauffage au gaz
ExpiredFR723770A
(fr)