... , and also hydro-power station, railroad, highway engineering, etc. The jumbo is designed with two drilling booms, advanced hydraulic rock ... rapid drilling speed and high efficiency. Flexible mechanism can make the jumbo drilling on face, slope, roof, side wall and ... °Feeder compensation1500mmFeeder tiltingDownward105°; Upward15°Swing feederLeft45°; Right45° Underground Coal Mining Equipment for Sale