duct pipe making machines line spiral duct machine exported widely
due to Primapress always give good after sales services and good quality, so Primapress exported millions of duct making machines.
including U Shape duct line , duct forming machine line 3, elbow making machine ,duct notching machine, electric shearing machine
folding machine, TDF bender , duct zipper, spiral former machine, tube forming machine, cnc plasma cutter, elbow maker, TDF Flange machine,
grooving machine, slip roller machine and so on. 
