... 2.Main power:1.5kw spiral flexible aluminum foil duct machine BK-50 Technical Terms:(7-corrugation ridge)1.Forming ... forming machine, flexible duct forming machine, auto roof forming machine, riveting machine, Pittsburgh seam lock machine. Hydraulic section steel bending machine, metal sheet flange forming machine, TDF ... 86-21-57842040Phone:+86-13817091187 spiral flexible aluminum foil duct machine