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| 单向〔止回〕阀 | |||
| 不回流阀 | |||
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| 止逆阀 | |||
| 单向阀门; 非复位阀; 逆止门 | |||
| 逆止阀; 止回阀; 止回阀 | |||
| 止回【单向】阀 | |||
| 抽汽逆止阀; 止回〔止逆〕阀 | |||
| 单向阀 | |||
| 单向阀〈注塑机〉 | |||
| 单向活门; 不回阀 | |||
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non return valve : 23 phrases in 8 subjects |
| Automobiles | 2 |
| Chemistry | 2 |
| Metallurgy | 2 |
| Plastics | 2 |
| Rail transport | 1 |
| Refrigeration | 1 |
| Shipbuilding | 1 |
| Technology | 12 |
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