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| fluid lubrication | |||
| hydrodynamic lubrication | |||
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| hydrodynamic lubrication | |||
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流体 润 滑 : 23 phrases in 5 subjects |
| Automobiles | 2 |
| Compressors | 1 |
| Oil / petroleum | 8 |
| Oil processing plants | 1 |
| Technology | 11 |
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