Shandong China Coal Group Drilling Machine Branch

On the afternoon of January 12, Nigerian merchants and their delegation came to Shandong China Coal Group for related issues such as agricultural equipment purchasing and long-term strategic cooperati

The old year has been passed with our happiness, the new year doomed to be affluent is coming. As 2018 Spring Festival approaches, China Coal Group distributed benefits for all staff to expressed Gro

Shandong China Coal Group hosted 2018 new employees training seminar to help new employees better understand the development process of China Coal Group

Many factors will cause pneumatic rock drill failures because of poor lubrication, here are some common reasons and troubleshootings 1. Oil hole of oil injector was blocked, should be cleaned after t

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,