Aluminum Flexible Duct Forming Machine HJ600LR Aluminum Flexible Duct Forming Machine HJ600LRMain technical data Now,looking at the Aluminum Flexible Duct Forming Machine HJ600LR have some following technical problems: 1, aluminum foil, steel wire instability and uneven glue. 2, debug problems. 3, uneven appearance of the steel wire 4 .Glue volatilize harmful to human 5.The low production ...