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| 机控阀: 22 phrases in 10 subjects |
| Automobiles | 5 |
| Aviation | 1 |
| Chemistry | 1 |
| Electronics | 3 |
| General | 1 |
| Mechanics | 1 |
| Metallurgy | 2 |
| Nautical | 2 |
| Technology | 5 |
| Wind Energy | 1 |
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