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活〔游滑〕轮
met. free wheel
活轮
oil free wheel
活 轮
: 46 phrases in 18 subjects
Agriculture3
Automobiles6
Aviation3
Chemistry2
Drilling1
Electric machinery1
Electronics1
General3
Hydroelectric power stations1
Information technology1
Metallurgy1
Oil / petroleum2
Plastics1
Polygraphy1
Refrigeration1
Technology16
Water resources1
Wind Energy1