六、Drilling tools for hydraulic rock drilling rigs  The main types of hydraulic drill rigs are: A. Drill rods and drill bits for underground tunneling drill rigs; […]

五、Production volume of main drilling tools in our country   5.1,Output of Drilling Tools for Light Rock Drilling Machinery H22mm tapered connection drill rod. The current annual output is 80,000 […]

一、Classification of rock drilling tools and engineering drilling tools According to the action principle of rock drilling tools when breaking rock, rock drilling can be divided […]