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径 程比 : 21 phrases in 9 subjects |
| Automobiles | 5 |
| Compressors | 1 |
| General | 1 |
| Mechanics | 1 |
| Nautical | 2 |
| Oil / petroleum | 2 |
| Rail transport | 1 |
| Shipbuilding | 1 |
| Technology | 7 |
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