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| 折射波法地震勘探利用地震折射波在岩、煤层内的传播规律，确定地下折射界面的深度及其性质，以解决地质问题的物探方法 | |||
| refraction seismic survey: 3 phrases in 2 subjects |
| Oil / petroleum | 1 |
| Technology | 2 |
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