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| 润滑油循环系统 | |||
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oil circulating : 22 phrases in 7 subjects |
| Compressors | 3 |
| Electric machinery | 2 |
| Metallurgy | 2 |
| Nautical | 2 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 10 |
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