Diving service ability in credit evaluation level II Certificate

Underwater fishing is dangerous, so it is very necessary to make preparations in advance. Before underwater fishing, please use lifting tools to prepare in advance. Next, follow Xiaobian to understand

Underwater cutting is another underwater project. With the rapid development of economy, underwater cutting is more and more widely used. What are the environmental requirements of underwater cutting?

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