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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
F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
F16K17/006—Safety valves; Equalising valves, e.g. pressure relief valves specially adapted for shelters
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FR902884A1962-07-041962-07-04Dispositif de fermeture rapide des conduites d'arrivée et d'évacuation de l'air pour les abris et réacteurs
ExpiredFR1327630A
(fr)