Hover to Zoom
DTH hammer is cheap
Cheap hammer DTH is a drill-and-burn method that uses the basic source of pressurized air. mounted behind the drill bit, inside the hole so that only a small amount of collision energy is lost as it passes through the drill rod and its connections. An example of a drill tool using rotary pound is jack hammer.
machine tool
Untuk keterangan lebih lanjut, silahkan download PDF ini :