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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
F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
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FR333538D1902-10-101903-07-02Perfectionnements dans les lampes à gaz
ExpiredFR333538A
(fr)