Since 1995,Website:http://www.spiral-forming.com, BOBO Machine start from a small workshop, focus on kinds of the ventilation air duct machine, especially the spiral duct forming machine and relevant round duct making machine. In past two decades, we dedicated to the metal strip spiral forming technology, such as the spiral tube machine, flexible spiral duct machine, control cable spiral conduit machine, spiral shower hose machine, spiral filter core tube machine. Etc.