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| 直通阀 | |||
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direct valve : 31 phrases in 10 subjects |
| Aviation | 1 |
| Compressors | 4 |
| Hydroelectric power stations | 3 |
| Mechanics | 1 |
| Nautical | 1 |
| Rail transport | 3 |
| Refrigeration | 2 |
| Shipbuilding | 1 |
| Steel production | 1 |
| Technology | 14 |
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