Shandong China Coal Group Drilling Machine Branch

the party secretary of Jining City People’s Congress Standing Committee, first deputy director Zhou Hong, Municipal Committee, Party Secretary of the High-tech Zone Bai Shan, researcher of Municipal C

China Unicom Shandong Branch leaders Huang Liang, Zhang Qingdong and Jining Unicom leaders Yang Tao visited Shandong China Coal Group

Warmly Welcome Leaders of China Unicom Shandong Branch to Visit China Coal Group for Inspection and Cooperation

A batch of rock drilling equipment air leg of Shandong China Coal Group

The sound of the pneumatic rock drill blows, combined with the explosive air exhaust, makes pneumatic rock drill dangerously loud, emitting 100 decibels at two meters. Sound-blocking earmuffs must be

Pneumatic Rock Drill or air leg rock drill is one of the toughest and difficult to manage tools used in the construction industry to demolish old concrete. The pneumatic rock drill itself is really he