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