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| valve opening | |||
| valve lift | |||
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阀开度 : 19 phrases in 11 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Compressors | 2 |
| Drilling | 1 |
| Electronics | 1 |
| Engineering geology | 1 |
| Hydroelectric power stations | 1 |
| Nautical | 1 |
| Oil / petroleum | 2 |
| Refrigeration | 2 |
| Technology | 6 |
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