Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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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
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F16J
PISTONS; CYLINDERS; SEALINGS
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F16J15/002
comprising at least two sealings in succession
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F16J15/008
with provision to put out of action at least one sealing; One sealing sealing only on standstill; Emergency or servicing sealings
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