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应用瞬变电磁法在岩溶地区进行面积性控制测量，在上覆低阻层（浮土、水）条件，通过分析视电阻率及二次场，准确地推断出岩溶及破碎带的分布情况。
By means of transient electromagnetic method, area control measurements are made in karst areas. Based on the analysis of apparent resistivity and secondary field, the distribution of karst and fractured zone can be accurately deduced in the condition of overlying low resistivity layer (floating earth and water).