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| 重力基座平台; 重力式平台 | |||
| 重力式平台 | |||
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gravity platform : 15 phrases in 6 subjects |
| Engineering geology | 1 |
| Navigation | 1 |
| Oil / petroleum | 5 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 6 |
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