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正〔直〕齿齿轮
transp. straight-cut gear
正齿齿轮
tech. spur-gear wheel
正 齿 齿轮
: 114 phrases in 17 subjects
Automobiles18
Aviation1
Business2
Compressors1
Computer numerical control2
Construction1
Electric machinery2
Hydroelectric power stations1
Metallurgy4
Nautical2
Oil / petroleum3
Plastics3
Rail transport2
Shipbuilding3
Technology63
Water resources1
Wind Energy5