The liner is assumed to be porous material and the partial sealing boundary condition of tunnel is introduced firstly to represente most of the real practical situations.
假定衬砌材料为多孔介质，引入了更符合工程实际的半封闭边界条件。
The liner is assumed to be porous material and the partial sealing boundary condition of tunnel is introduced firstly to represente most of the real practical situations.
假定衬砌材料为多孔介质，引入了更符合工程实际的半封闭边界条件。
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