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dril. packing ring
Gruzovik, mil., artil. obturating ring
mech.eng., obs. gasket ring
nautic. piston ring; packing ring (в сальнике)
tech. insertion ring; gasket
therm.eng. insertion ring (для уплотнения сальника)
набивочное кольцо: 4 phrases in 3 subjects
Drilling1
Shipbuilding1
Transport2