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减震 弹簧 : 15 phrases in 9 subjects |
| Construction | 1 |
| Drilling | 3 |
| General | 1 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil / petroleum | 2 |
| Plastics | 1 |
| Shipbuilding | 2 |
| Technology | 3 |
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