1. This model adopts a frame-type boom, which has strong strength and can well adapt to the small section roughening operation, and can meet the operating requirements of the gun hammer pitching and swinging without dead angle. The jib structure is compact, the force is more concentrated, the action is more stable, the turning radius is small, and the transition is flexible, which can meet the needs of roadway operation to the maximum extent.
2. The impact hammer of this model is designed for roughening, which can not only clean up the broken part, but also protect the original tunnel roof from damage as much as possible.
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