但随着勘查精度要求的提高，对瞬变电磁方法技术的研究提出了新的课题。
However, as the survey precision required improvement in the transient electromagnetic methods presented new research on technology issues.
本文重点介绍了瞬变电磁法技术在有色地质系统金属矿产勘查中的进展及应用效果。
This paper mainly reports the progression and application effect of the transient electromagnetic method used in nonferrous metallic mineral exploration.
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.
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