Shandong China Coal Group Drilling Machine Branch

The air leg rock drill is an earlier stereotyped product in my country. Compared with the same type rock drill, it has the characteristics of light weight, low noise, high efficiency and good economic

Roof bolter is a supporting equipment in the construction process, which assists workers to carry out anchoring works in dangerous positions, and has the characteristics of safety explosion-proof and

On June 17, Niu Huilan, Vice Chairman of the Jining Municipal Association for Science and Technology, Yu Songyuan, Deputy Secretary General of the Municipal Association for Science and Technology, Zha

The inspection work of the pneumatic pavement breaker is the most basic, and it should not be taken lightly. The failure of many pneumatic pavement breaker is due to the slight anomalies that are not

Safety precautions in the use of water well drilling rigs 1. When the water well drilling rig is parked or before firing, all switches should be in the "0" position, and the power supply should be cut

In order to regulate the unmanned aircraft engaged in operational flight activities and promote the safe, orderly and healthy development of the unmanned aircraft industry, the Civil Aviation Administ