青云翻译

The dig after first pumping technology, Exhausting while digging method, bedding and Borehole drainage technology for anti-conflict effects, to study the process of its construction and drainage parameters.

Inspected after the first driving technology, driving method, bedding and through coal outburst-prevention effect of drainage technology, research and drainage construction technology of its parameters.

After inspected has pulled out first digs the technology, pulls out while digs the method, and puts on the level drill hole along the level to pull out puts the technology to guard against suddenly the effect, has studied its construction craft and pulls out puts the parameter.

After taking the first Excavation Technology, edge the edge, and low-level excavation methods and through the drilled hole in the defense and technology, a study of its construction process and extract the parameters.

Inspected after the first driving technology, driving method, bedding and through coal outburst-prevention effect of drainage technology, research and drainage construction technology of its parameters.