1).plate roll. 2).The top and bottom roll can be ... ISO9001:2000 certicated 1).rolling machine,plate bending machine,plate roll,bending roll,roll bending machine,plate bending rolls.2).This machine structure ... roll in the two lower rollers symmetrical position for the vertical movement, through the silk and silk worm drive female, ... that the aircraft need to rely on other devices end plate pre-bending.