但是在不规则井眼中，小范围深度段的突然变径会导致线圈阵列中只有一个线圈输出信号，而其它线圈内的信号为零。
However, a sharp increase in diameter over a small depth interval can induce signals on one coil in the array and not in others.
但是在不规则井眼中，小范围深度段的突然变径会导致线圈阵列中只有一个线圈输出信号，而其它线圈内的信号为零。
However, a sharp increase in diameter over a small depth interval can induce signals on one coil in the array and not in others.
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