Shandong China Coal Group Drilling Machine Branch

On April 7, a batch of gasoline rock drill were successively loaded in the intelligent equipment manufacturing workshop of China Coal Group, and will be sent to Meizhou City in Guangdong Province and

Failure 1: Rock drilling speed is reduced (1) Reasons for the failure of the rock drill: first, the working air pressure is low; second, the air leg is not flexible enough, the thrust is insufficient

In the afternoon of March 28, Deputy Mayor of Jining Municipal People's Government, Secretary of the Party Committee and Director of the Municipal Public Security Bureau, Li Haiyang, Deputy Secretary-

In order to earnestly implement the important speech of General Secretary Xijinping's important speech at the co-ordination of the new crown pneumonia epidemic prevention and control and economic and

On the morning of March 27th, many leaders of Jining Supply and Marketing Co. visited China Coal Group for a visit and inspection on the research and development of UAV production and the next coopera

(1) Before ventilating the air leg rock drill, the handle of the pressure regulating valve should be moved to the "O" position to prevent the air leg from elongating suddenly during the ventilation an