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| 单向〔止回〕阀; 止回〔止逆〕阀 | |||
| 单向阀; 止回阀; 逆止阀 | |||
| 单通阀 | |||
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| 单向阀 | |||
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one-way valve : 6 phrases in 2 subjects |
| Refrigeration | 1 |
| Technology | 5 |
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