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机油 管 : 34 phrases in 11 subjects |
| Automobiles | 15 |
| Aviation | 2 |
| Drilling | 1 |
| General | 2 |
| Hydroelectric power stations | 1 |
| Mechanics | 1 |
| Mining | 2 |
| Oil / petroleum | 4 |
| Oil processing plants | 1 |
| Shipbuilding | 2 |
| Technology | 3 |
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