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variable gear
busin. 变速轮; 变速装置
CNC 变速齿轮
variable gear: 39 phrases in 16 subjects
Agriculture2
Architecture1
Automobiles4
Aviation1
Business2
Cycle sport1
Earth sciences2
Electronics2
Mechanic engineering1
Mechanics1
Metallurgy4
Oil / petroleum2
Plastics5
Technology7
Transport2
Wind Energy2