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| 直接作用阀 | |||
| 直动阀 | |||
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| 直动阀; 直接操作阀 | |||
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direct-acting valve : 7 phrases in 5 subjects |
| Compressors | 1 |
| Hydroelectric power stations | 1 |
| Rail transport | 1 |
| Refrigeration | 1 |
| Technology | 3 |
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