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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
F16J—PISTONS; CYLINDERS; SEALINGS
F16J15/00—Sealings
F16J15/002—Sealings comprising at least two sealings in succession
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FR569171D1922-09-301922-09-30
Sealing for pressurized fluids
ExpiredFR569171A
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