... , transportation projects, water conservancy and national defense building. ◊ YT28 air-leg rock drill has wide applications. It is applied to drilling ... machine can also work with different air legs - FT160BDshort leg, FT160BC long leg, or FT160S double legs, to fit in different sizes ... dia34~45mmshank dimension22×108±1 mm pneumatic rock drills, pusher leg, rock drill YT28