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干 润 滑 : 38 phrases in 9 subjects |
| Automobiles | 4 |
| Aviation | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Metallurgy | 17 |
| Nautical | 1 |
| Oil / petroleum | 6 |
| Space | 1 |
| Technology | 6 |
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