2021-10-20

The right thing to do is to measure "O", the clear opening size of the manhole. "O" is the most important parameter we need to get. Read More

2021-10-19

IntroductionManholes play a vital part in the conservation of your area's structure, and their generalities date back to the Roman civilization. Numerous of our everyday mileage requirements, including electricity, gas, telephone, waste junking, and water, come from underground cables, pipes, rainsp Read More

2021-01-05

The composite material is a new type of material that is composed of several types of different materials, such as organic polymers, inorganic non-metals or metals, through a composite process. It can not only retain the main characteristics of the original composition material, and obtain the performance that the original composition does not have through the compound effect. The performance of each component can be complemented and related to each other through design, so as to obtain new superior performance, which is essentially different from the simple mixing of general materials. Read More