Box culvert moulds are often used in the construction of urban under-ground tunnels for the concentrated laying of municipal pipelines of electricity, communications, cables, water supply, drainage, heating and gas. lt fundamentally solves the problem of "road zipper"- repeating trenching, and will gradually replace main streets overhead spider-web lines.

Based on the domestic condition of underground construction, we developed our mould that is suitable to bad environment, no deformation in continuous production, anti-leakage, and with smooth surface and no porosity of finished products. With continuous refinement and improvement, our moulds have been adopted by more and more precast concrete element factories in China.