W 'th a ring type receiver at the top the night, of the lightning rod can be reduced and the degree of reduction is proportional to the radius of the ring.
顶部装有环形受雷器避雷针的高度可以降低，降低幅度与环半径成正比。
W 'th a ring type receiver at the top the night, of the lightning rod can be reduced and the degree of reduction is proportional to the radius of the ring.
顶部装有环形受雷器避雷针的高度可以降低，降低幅度与环半径成正比。
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