... welded,vibration to eliminate stress,high in rigidity.Hydraulic drive,swing beam,return of knife beam is smooth and prompt Frame ... welded,vibration to eliminate stress,high in rigidity.Hydraulic drive,swing beam,return of knife beam is smooth and prompt ... beam can be adjusted steplessly,conveniently and fast.Preselection of single or continous strokes.Preselection of cutting number and cutting strokes ...