... is a new type of down-the-hole drilling machine following up the up to date technology( ... is a new type of down-the-hole drilling machine following up the up to date technology abroad, ... tunnel, water dam, etc. It adopts percussion down-the-hole, all-wheel driven carrier, hydraulic long distance ... 5Km/hGradeability: 140(25%)Turning radius: 3600 at the same size shaftPower: motor: 15KW 380V 50HZDimension: ...