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让我们把它看作是环环相套的三个圈。
Let's think of it as three circles one inside another.
youdao
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测量每相金属屏蔽、金属套与大地之间的绝缘电阻。
Measure each phase metal mask, metal sleeve to ground insulation resistance.
youdao
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测量每相金属屏蔽、金属套与大地之间的绝缘电阻。
Measure each phase metal mask, metal sleeve to ground insulation resistance.
youdao