As for the normal situations, no necessary to use concrete as the base when arranging pipes, construction speed is fast;

一般情况下，排管不需要做混凝土基础，施工速度快；

youdao

As for the normal situations, no necessary to use concrete as the base when arranging pipes, construction speed is fast;

一般情况下，排管不需要做混凝土基础，施工速度快；

youdao