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| 明杆阀; 升杆阀 | |||
| 逆止阀 | |||
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rising stem valve : 15 phrases in 7 subjects |
| Chemistry | 1 |
| Ecology | 2 |
| Hydroelectric power stations | 2 |
| Mechanics | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Technology | 5 |
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