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外电源 wàidiànyuán
el. outside power
oil external power
外 电 源: 66 phrases in 18 subjects
Air defense1
Automobiles2
Aviation24
Computer numerical control1
Construction1
Drilling1
Earth sciences2
Electric machinery2
Electronics10
General2
Information technology1
Metallurgy1
Nautical1
Nuclear and fusion power1
Project management1
Space6
Technology8
Telecommunications1