Analysis from theory of lightning stroke shows that conventional measures for prevention of lightning cannot improve the level of lightning prevention of OPGW.

从雷击理论来分析，常规的防雷措施是不能提高OPGW的抗雷击水平的。

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The trip ratio of the double-circuit line on the same tower is very high. So the study on lightning prevention should be enhanced and corresponding calculation method should be put forward.

同塔双回线路跳闸率很高，应尽快加强防雷研究，提出相应的计算方法。

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In the past year AHRQ became a lightning rod when one of its task forces on prevention recommended that women get fewer mammograms.

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