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润滑油膜
dril. fluid film
el.mach. oil film
met. lubricant film
oil lubricating oil film
shipb. lubricating film
space film of lubricant
tech. oil-bound film
润滑油膜: 29 phrases in 12 subjects
Agriculture1
Automobiles3
Aviation1
Compressors2
Electric machinery2
Electronics1
Metallurgy4
Oil / petroleum2
Rail transport1
Shipbuilding1
Space3
Technology8