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| 开关接地: 29 phrases in 11 subjects |
| Air defense | 2 |
| Automobiles | 4 |
| Drilling | 1 |
| Electric machinery | 3 |
| Electronics | 7 |
| General | 1 |
| Hydroelectric power stations | 3 |
| Mechanics | 1 |
| Rail transport | 1 |
| Technology | 5 |
| Wind Energy | 1 |
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