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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
F16K27/00—Construction of housing; Use of materials therefor
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FR589998D1924-11-241924-11-24Perfectionnements apportés aux dispositifs obturateurs
ExpiredFR589998A
(fr)