The menace of transmission line safe operation is the ice flashover accident of transmission line insulator.

线路绝缘子发生覆冰闪络故障，对线路安全运行造成了威胁。

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The menace of transmission line safe operation is the ice flashover accident of transmission line insulator.

线路绝缘子发生覆冰闪络故障，对线路安全运行造成了威胁。

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