ally suitable for areas with low foundatio 涵管厂家热镀锌 波纹涵管 全国供应 直径壁厚波形全国各地可送 波纹管厂家直销n bearing capacity and earthquake prone areas such as soft soil, expansive land, and collapsible LOESS. After the completion of the pipe connection, the site coating asphalt can completely avoid the erosion of perennial blisters and acid-base soils, ensure the service life and safety of personnel and equipment. Repair of culverts In some special areas and sections, uneven settlement c