The key to safe operation of electrical transmission line is the quality of suspension insulator.

输电线路可靠性运行的关键是悬式绝缘子的质量。

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Therefore, the insulator should have both good electrical properties and sufficient mechanical strength.

因此，绝缘子既要有良好的电气性能，又要有足够的机械强度。

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Therefore, the insulator should have both good electrical properties and sufficient mechanical strength.

因此，绝缘子既要有良好的电气性能，又要有足够的机械强度。

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