... 3.Offset 80-100HP tractor 4.Mn65 steel materal,40 Disc,dia.560mm 1BJ-4.4 Wing-folded Hydraulic Offset Medium ... Disc Harrow Description:1BJ wing-folded hydraulic offset middle-duty ... has the advantages of wide operation, narrow transportation, easy flapping, compact structure, high operational efficiency, convenient operation and maintenance, etc.Main ...