... semi-inert long life anode 半惰性长寿命阳极 semi-infinite earth 半无限地层 semi-infinite slab 半无限平板 ...
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Based on model comparison between the semi-infinite earth and the circular tunnel with peripheral infinite earth, the conception of long and large tunnel in the electrical meaning is put forward.
在比较半无限平面大地模型和四周无限大地圆形隧道模型基础上，提出电气上的长大隧道概念。
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