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开-关 控制 : 94 phrases in 13 subjects |
| Automobiles | 1 |
| Aviation | 2 |
| Computers | 1 |
| Electrical engineering | 1 |
| Electronics | 28 |
| General | 20 |
| Information technology | 2 |
| Military | 1 |
| Oil processing plants | 2 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 32 |
| Welding | 2 |
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