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| 自然电场法研究和利用地下自然电场,进行找煤和解决水文地质等问题的物探方法; 自然电位法研究地下自然电场以解决地质问题的方法 | |||
| 自然电场法 | |||
| 自然电位法 | |||
| self-potential method: 10 phrases in 1 subject |
| Technology | 10 |
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