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齿弧 chǐhú
gen. ratchet; ratch
tech. rack circle; sector; sector gear; tooth sector
齿弧
: 85 phrases in 13 subjects
Automobiles36
Business1
Compressors3
Computer numerical control1
Electric machinery1
General1
Mechanic engineering1
Metallurgy3
Nautical1
Oil / petroleum2
Shipbuilding1
Technology32
Wind Energy2