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driver screw
auto. 传动螺杆
driver screw: 42 phrases in 16 subjects
Agriculture1
Architecture1
Automobiles7
Chemistry1
Compressors1
Computer numerical control2
Cycle sport2
Economy1
Hydroelectric power stations2
Mechanic engineering1
Nautical1
Nursing1
Shipbuilding1
Sports1
Technology18
Wind Energy1