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| 地层倾斜; 矿层倾斜; 岩层倾斜; 煤层倾斜 | |||
| 地层倾斜层倾斜; 地层陷落 | |||
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падение пласта : 18 phrases in 5 subjects |
| Construction | 1 |
| Drilling | 1 |
| General | 8 |
| Geology | 7 |
| Oil / petroleum | 1 |
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