... leveler grooving roll, hydraulic notch and punch square machine, hydraulic s duct machine:Auto-line V includes a metal feeding frame, ... notch equipment, hydraulic cutter, movable Pittsburgh lock machine, duplex trans-verse flange manufacture machine, TDF hydraulic folder and CNC system. Its ... area. It is possible to produce square duct of small cross section area of 200X200mm. ACL Duct machine