The main integral harrow is made of square tubes welded together which ensures simple structure and good rigidity.The harrow is also equipped with hydraulic lifting rubber wheels for conveniet transportation and small turning radius,thus the production efficiency and lifetime of the harrow is dramatically improved .The bearing for the harrow is made of taper bearing with sealing washer which is of strong rated load and low tractive resistance, thus guarantees the easy use and maintenance.All the above makes this series the more advanced cultivating agricultural tools in China.