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| 压力操作阀 | |||
| 压力操纵阀 | |||
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| 压力作动阀 | |||
| 压力操纵阀 | |||
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pressure operated valve : 15 phrases in 6 subjects |
| Automobiles | 1 |
| Metallurgy | 1 |
| Mining | 2 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 8 |
| Technology | 2 |
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