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| three phase three wire system | |||
| three phase three-wire system | |||
| three-phase three-wire system | |||
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| three-phase three-wire system | |||
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三相三 线 制 : 21 phrases in 9 subjects |
| Air defense | 2 |
| Aviation | 1 |
| Electric machinery | 2 |
| Energy industry | 1 |
| Hydroelectric power stations | 2 |
| Information technology | 3 |
| Metallurgy | 1 |
| Rail transport | 1 |
| Technology | 8 |
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