In essence, this is an an electrical transmission line.
从本质上讲，这是一个电力传输线。
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。
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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