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| 地面标高; 地面高程 | |||
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level of ground : 10 phrases in 7 subjects |
| Agriculture | 1 |
| Chemistry | 1 |
| China | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Geology | 1 |
| Metallurgy | 1 |
| Technology | 3 |
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