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| 滑油循环: 23 phrases in 9 subjects |
| Automobiles | 4 |
| Chemistry | 1 |
| Compressors | 1 |
| Electric machinery | 1 |
| Metallurgy | 1 |
| Nautical | 5 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Technology | 8 |
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