Someone recently asked small drill with rotary drills where not the same? You know, come and look at it.
Drill is the percussive-Rotary drilling rig, internal structure and General rock drill is not the same as, valve and piston reciprocating arrangement it is independent, that is percussion, rotary drill is a drilling equipment, used more in large open-pit mines.
Downhole drilling rig has two kinds of pneumatic and electric motors, wind motive power than larger drill depth is larger than electric, electric strength is the number of complete sets of equipment and less weight, more suitable for on site transport. DTH drilling angle from close to zero to nearly 90-degree change, rotary drill is in engineering investigation is used more for the drill, although the head angle can be adjusted, but the angle of more than 45 degrees into the more difficult.
Above is the difference between rotary drill with drill, do you understand now?