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| back valve; reversing valve | |||
| reverse valve; reverse acting valve | |||
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回 动 阀 : 25 phrases in 7 subjects |
| Architecture | 1 |
| Automobiles | 2 |
| Earth sciences | 1 |
| Mechanics | 1 |
| Metallurgy | 1 |
| Technology | 17 |
| Wind Energy | 2 |
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