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| 联动挡链系 | |||
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gear chain : 22 phrases in 9 subjects |
| Automobiles | 1 |
| Chemistry | 1 |
| Mechanic engineering | 2 |
| Metallurgy | 1 |
| Nautical | 3 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Shipbuilding | 4 |
| Technology | 8 |
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