LC-10, LC-12, LC-15 in this series is the most common traditional duct making machinery, customers can change the desired rolling wheels as needed to reach a machine can, with a variety of adaptability is extremely broad. The machine is light weight, easy to move, the most suitable for the construction site. Depending on the needs of a combination of wide adaptability. LC-12 type processing sheet thickness of 0.5-1.2mm, LC-15 type processing sheet thickness of 0.7-1.5mm, the duct can be substantially meet the manufacturer's needs.