Aluminum-twisted is suitable for the common overhead power lines with the smaller distance and less force.

铝绞线适用于受力不大，档距较小的一般配电线路。

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The validity of the method is proved by calculating the mutual impedance between overhead power lines and underground telecommunication lines.

架空电力线路与地下通信线路互阻抗的计算结果验证了论文方法的正确性和高效性。

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This thesis is based on this background to do an in-depth study on target detection and tracking method for overhead power lines inspection robot.

本论文正是基于这一背景下，对架空电力线路巡检机器人目标的检测与跟踪方法做了研究。

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And Metro-North Railroad's New Haven line relies on overhead power lines that could get tangled in blown foliage.

WSJ: New York City Transit System Braces for Water Surge

But going underground is an expensive proposition: The direct costs are much more than those associated with traditional overhead power lines.

FORBES: Upgrading the Grid by Going Underground

Network Rail is replacing overhead power lines installed 30 years ago, reducing the number of delays and cancellations caused by faults.

BBC: Lines between London and the east needs faster trains