YT28 pneumatic air-leg rock drill: 1. efficient drilling 2. widely used 3. easy handle 4. quick replacement YT28 pneumatic air-leg rock drillThe YT28 rock drill is a kind of high efficiency air leg rock drill machinery. It is mainly used for diging into mine laneway and blasting holes in all drilling works. It is indispensably importance machine tool in metallurgy, coal, railway, traffic, water ...