有电抗线圈的分段开关 reactance breaker
每一线圈包括多个线圈段。
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.
用途：适用于各种多段线圈连续绕制的自动排线。
Usage: suitable for automatic wire winding and arraying of continuous winding multi-segments coil.
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