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逆 电流器 : 30 phrases in 12 subjects |
Automobiles | 1 |
Aviation | 1 |
Earth sciences | 1 |
Electric machinery | 2 |
Electronics | 4 |
General | 6 |
Geophysics | 1 |
Hydroelectric power stations | 2 |
Metallurgy | 1 |
Oil / petroleum | 1 |
Technology | 8 |
Wind Energy | 2 |