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人字齿 rénzìchǐ
auto. double helical tooth
tech. double helical gear tooth; herringbone gear tooth
wind. herringbone tooth
人 字齿
: 53 phrases in 15 subjects
Agriculture1
Automobiles5
Chemistry2
Compressors1
Drilling3
Engineering geology1
Hydroelectric power stations1
Mechanic engineering3
Mechanics1
Metallurgy5
Oil / petroleum3
Shipbuilding2
Steel production3
Technology16
Wind Energy6

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