The drilling machine is divided into two types: rock drill and drilling rig. The drilling rig has the distinction of open drilling rig and underground drilling rig. 1 Rock drill: used to drill blastholes with a diameter of 20-100 mm and a depth of 20 meters in the rock above medium hard. According to their different powers, they can be divided into pneumatic, internal combustion, hydraulic and electric rock drills. Among them, pneumatic rock drills are the most widely used. 2 Open-air drilling rigs: According to the working mechanism of broken ore, it is divided into steel rope impact drilling machine, down-the-hole drilling machine, cone drilling machine and rotary drilling machine. Steel rope impact drills have been gradually replaced by other drills due to their low efficiency. 3 Downhole drilling rig: When drilling a downhole blasthole with a hole diameter of less than 150 mm, a small diameter drill hole of 80 to 150 mm can be applied in addition to the rock drilling machine. LED Outdoor Colorful Ball Lights,Simulation Crystal Ball Light,Outdoor Ball Lights,Outdoor Garden Ball Lights Sichuan Kangruntengpu Photoelectric Technology Co., Ltd. , https://www.krtoplighting.com