Welding

What is the treatment principle of sunken ship salvage underwater engineering? The basic principle of underwater engineering is chemical grouting. Chemical grouting is to inject the pressure polymer m

At present, many consumers come to our company for inspection and consultation on the underwater rescue price of our technicians. What is the price measurement standard? Why are some prices very low a

Dredging is an underwater earthwork excavation project that uses manpower or machinery to dredge, expand or excavate deep rivers, lakes and other waters. For a long time, channel dredging has been an