A rock drill is a heavy tool or machine used to make holes in hard stone. It breaks rock using sharp hits or spinning bits. Workers use rock drills in mining, road building, and digging tunnels to place explosives or set anchors
A rock drill is a heavy tool or machine used to make holes in hard stone. It breaks rock using sharp hits or spinning bits. Workers use rock drills in mining, road building, and digging tunnels to place explosives or set anchors
