... , debug problems. 3, uneven appearance of the steel wire 4 .Glue volatilize harmful to human 5.The low production efficiency ... technology to develop advanced HJTF600-LR Aluminum Flexible Duct Forming Machine, its appearance beautiful, simple structure,increased ventilation facilities ... 2mm Speed Main power5.2KW Heater Power380V/50HZ Weigh450KG Machine Dimension3100*920*1700 Spiral pipe making machine