... :R200~300mm 2, Bending angle: 90-180 3, Application:aluminum alloy rail bending Dongguan RiDong Ultrasonic Machinery Co., Ltd ... curtains fabric cutting/slitting/welding machine, window curtains rail bending machine, etc. Window Curtains Track Bending MachineThis machine is mainly used to ... the chord length, the device can bend aluminum automatically. 3, Smooth radian. 4, Saved labor and material costs ...