在大多数勘查地球物理电磁法的应用中，利用长导线源克服天然场干扰问题是非常必要的。
It's indispensable to use the long wire source to overcome the interference of the natural source in most of the electromagnetic methods of exploration geophysics.
本文就当前地下水中地球物理勘查技术的应用进行了深入的探究。
In this paper, the application of geophysical exploration technique in current groundwater makes a deep exploration.
乙级：区域地质调查；地球物理勘查；岩矿鉴定与岩矿测试。
Class B: areal geology survey; geophysical exploration; rock ore appraisal and testing.
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