日本关门隧道、青函隧道都是典型的矿山法施工的隧道。

Kan-Mon Tunnel and Sei-Kan Tunnel in Japan are typical tunnels constructed by mining method.

youdao

日本关门隧道、青函隧道都是典型的矿山法施工的隧道。

Kan-Mon Tunnel and Sei-Kan Tunnel in Japan are typical tunnels constructed by mining method.

youdao