1. Strong structure: The pipe culvert is made of reinforced concrete and other high-strength materials, which has high pressure resistance and tensile...
According to the functions and structural characteristics of the use, the duct can be divided into many types. Common types of culverts include circul...
Guanhan, as the name implies, refers to large pipes or tunnels buried underground. It is mainly used to transport water flow, gas or other fluid media...