Shandong China Coal Group Drilling Machine Branch

In order to celebrate the 99th anniversary of the founding of the Communist Party of China, review the party’s glorious history, promote the party’s fine traditions, and enhance the cohesion and comba

Roof bolter is a key equipment in the bolt support project. The speed and effect of the support are closely related to the quality of the support. Roof bolter can improve the efficiency of constructio

1. The function of the cooling system of the water well drilling rig When the engine of the water well drilling rig is working, a large amount of heat is generated due to fuel combustion and friction

Gasoline rock drills are mainly used for pavement crushing, wall demolition, railway tamping, stone crushing, cement, concrete and frozen soil crushing. Gasoline rock drills are easy to operate, save

According to the relevant provisions of the "Measures for Evaluation of Scientific and Technological SMEs" (Guokefazheng [2017] No. 115) and the Provincial Department of Science and Technology "Notice

Air leg rock drill operation will have different situations during operation, so how to avoid unnecessary trouble and carry out construction safely, which of course requires the operator to pay more a