Considering the relative permeability of lining and surrounding rock or soil, the tunnel is assumed to be partially sealed.
考虑衬砌和围岩(土)的相对渗透性，隧洞处于半封闭状态。
Considering the relative permeability of lining and surrounding rock or soil, the tunnel is assumed to be partially sealed.
考虑衬砌和围岩(土)的相对渗透性，隧洞处于半封闭状态。
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