This paper will introduce how to build the mathematical models, and calculate the protection range of the lightning rods via CAD technology.
2
最后通过避雷针保护范围的计算，说明了在重要工程中采用提前放电式避雷针的重要意义。
Finally, based on calculating the protective range of lightning rod, the importance of using early streamer emission lightning rod in important project was explained.
3
当被保护物在避雷针的安全保护范围之内时，落在安全落雷范围内的雷电将击中避雷针。
As the protected object is within the safe protective range of the lightning arresters, the lightning fell within the safe lightning falling range will hit on the arresters.
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