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| star-star connection; Y-Y connection | |||
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星形-星形接线 : 35 phrases in 11 subjects |
| Aviation | 1 |
| Construction | 1 |
| Electric machinery | 2 |
| Electronics | 14 |
| General | 2 |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Rail transport | 2 |
| Space | 1 |
| Technology | 7 |
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