But in tunnels, especially in long tunnels, it will be better to use leaking coaxial cable.

而在隧道区间，特别是长隧道区间，用泄漏同轴电缆辐射覆盖较优。

youdao

But in tunnels, especially in long tunnels, it will be better to use leaking coaxial cable.

而在隧道区间，特别是长隧道区间，用泄漏同轴电缆辐射覆盖较优。

youdao