... ISO9001:2008 ,CE Certificate The hydraulic coiling machine with 4 rollers is suitable for bending and forming of mental plate, and ... in a certain rang. The hydraulic coiling machine with 4 rollers has a plate-end-pre-bending function, and he width ... plane calibrating of metal plate.The hydraulic machine with 4 rollers is widely used for industries of petroleum, chemistry , boiler, shipbuilding ...