... width: 2000mm 4) CE standard.ISO GBZF12 model TDF flange folder is a kind of new product designed ... by our factory to push TDF airduct bend of high strength and high seal ... folder, it can not only fold the airduct with TDF(see figure 1 below ),but also fold geneal ... ,rib roller ,seam locker and it ,which from TDF airduct semi-production line (see figure),can enormously enhance ...