According to defend thunder to be grade different, there is different protection radius, has introduced the computing technology.
根据防雷等级不同，有不同的保护半径，并介绍了计算方法。
According to defend thunder to be grade different, there is different protection radius, has introduced the computing technology.
根据防雷等级不同，有不同的保护半径，并介绍了计算方法。
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