... for ducts, or use with a plasma cutting machine.Fold--cut, combined pittsburgh, shaped clip or angle iron or insert ... insert flange duct.Notch and punch square--cut feeding metal for TDFnotch-double drive to make shape-folding, cutting--combine TDC ... metal sheet flange forming machine, TDF hydraulic folder, auto cutting to length line, pipe bending machine , FN seam welder,notching and shearing machine ...