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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
FR831778D1938-01-071938-01-07Dispositif de commande pour conduites de fluides liquides ou gazeux, et applications de ce dispositif
ExpiredFR831778A
(fr)