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Individual roller driven: hydraulic three-roller plate bending machine owns national patent, which was first invented by Ezhong. Its function lies in that it may enable the machine to greatly satisfy the technical requirement of thick plate bending.Top-located cylinder: it is designed on the basic of many years' research. It absorbs the advantages of several Japanese, German, and Chinese models. Its advantages are:a. Both cylinders work without rod cavity, so the effective area is largeb. Compared with the in-backseat cylinder, maintenance is more convenientc. only one dynamic sealing, air holding property and reliability are excellentd. Lifting speed fits to bending process. Throttle is not necessary, so oil temperature is low and energy consume is smallComplete machine backseat: Ezhong horizontal three-roller series adopt once-through welding structure. Compared with assembled backseat, it has no assembly tolerance and accumulated processing tolerance after annealing. The installatio