最后，本文就长大隧道坡度折减系数的分析及标准本身的研究提出了建议。

It also gives some Suggestions on the studies of gradient reduced coefficient of traction in long tunnels and the design standard.

youdao

最后，本文就长大隧道坡度折减系数的分析及标准本身的研究提出了建议。

It also gives some Suggestions on the studies of gradient reduced coefficient of traction in long tunnels and the design standard.

youdao