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控制〔输运,运载〕气体
chem. carrier gas
控制气体
oil pilot-gas
控制 气体: 39 phrases in 15 subjects
Agriculture1
Automobiles1
Aviation1
Chemistry1
Electronics10
Explosives and Explosive Ordnance Disposal2
Metallurgy4
Nautical2
Oil processing plants1
Rail transport2
Refrigeration2
Skydiving1
Space4
Technology4
Welding3