绝缘回线;
In comparison, the influences of the lengths of metal mandrel, insulated rod and return circuit electrode on depth of investigation are relatively small, while that of the length and width of plate electrode are relatively large.
相对而言,金属芯棒、绝缘棒和回路电极的长度对探测深度的影响较小,而极板的长度和宽度影响较大。
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