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YN27C gasoline rock drill is a high efficient drill machine. ack hammer can be converted into a breaker or a hammer, for breaking, digging, splitting or ramming. It is suited to build of bridge, road, power station, geological explortation etc. Rock drill is portble machine, it is also can use with supporting stand. Hand-held internal-combustion rock drill is a hand-rockdrilling tool which integrates small gasoline engine,compressor and rock drill. It is easy to be carried along,. It is stuited to work on high mountains, plains, hot and cold area with no power and no water supply and air compressing equipments, and especially suits the projects that the machine has to be carried at any time and in any area. Used to drill vertical downward hole(max depth 6m) and and