Anhui Preda Machine Manufacture Co.,Ltd is specialized in manufacture and export for all kinds of HVAC duct forming machines. Our main product cover all kinds of rectangular/spiral duct forming lines and relavant machines! The relavant machines include Uncoiler, Grooving machine,Levelling and Grooving machine, Electric shearing machine,Pittsburgh machine,TDF Flange forming machine, Duplex Flange forming machine,Angle iron rolling machine,Manual/Pneumatic Folding machine,Horizontal Pneumatic Seaming machine,gorelocker and etc.