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直径比
compr. diameter ratio
直径比
: 60 phrases in 20 subjects
Agriculture1
Architecture1
Automobiles5
Aviation5
Cables and cable production1
Cinematography1
Drilling1
Earth sciences3
Engineering geology1
Explosives and Explosive Ordnance Disposal3
General3
Hydroelectric power stations2
Mechanics1
Metallurgy4
Oil / petroleum3
Oil processing plants1
Space4
Superconductivity1
Technology18
Wind Energy1