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to phrases
针齿轮
螺旋量
coal.
face advance
螺旋量:
44 phrases
in 15 subjects
Animal husbandry
2
Automobiles
2
Aviation
1
Dermatology
2
Drilling
1
Electric machinery
1
Electronics
1
Explosives and Explosive Ordnance Disposal
1
General
1
Metallurgy
3
Oil / petroleum
2
Shipbuilding
4
Skydiving
1
Space
1
Technology
21
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