Shandong China Coal Group Drilling Machine Branch

Gas and water Malfunction failures of air leg rock drill are mainly due to: high water pressure, gas and water blocked, water valve spring failure, leakage, leakage, apron failure, parts of the valve

The reason for the formation of air leg rock drill water needle fault: The center hole of the shank is not correct, the gap between the shank and the shank is too large, the water needle is too long,

China Coal Group was invited to exhibit on 1st Session of Jining Conference and Innovation Achievements "Ming You Te Xin" Commodity Expo

. Malaysian merchants expressed their satisfaction and signed a water well drilling rig ordering contract on the spot. Both parties formally reached long-term strategic cooperation and signed a memora

Xinjiang Yingjishang Economic Commission Director Wang and his entourage visited Shandong China Coal Group for investigation and study on the development of our group's e-commerce and the next aid Xin

Shandong China Coal Group held excellent reinstatement staff forum in order to let the employees of China Coal Group understanding the company's pioneering process and experiencing the rapid developme