Gasoline Rock Drills

Description of gasoline rock drills:
The Internal Combustion rock drills YN27J is a very efficient machine with the characters that the structure is very compact. Less of the easy-to-damage-parts, and very easy to control. It can adapt to these outside situations there is no water and no electronic power. It is a kind hand held drill built up with gasoline engine, air pump, rock drills and the rotation plumbum equipment for running or stop. It can be used as a tool for breaking, percussive drilling, tamping besides rock drilling.