Lanzhou Automatic duct production five lines and automatic duct production of five lines, linear structure to reduce the transfer time of sheet metal, high production efficiency, the sheets are independent frequency control motor drive, 10 stick leveling beading institutions to ensure a variety of thick plate sheet flatness, processing material saving mode, per volume material only a scrap of less than 20mm, folded side servo feed precise positioning, especially in the mouth font duct processing, have obvious advantages, The touch screen and keyboard dual mode ensures stable operation, only one operation, two pipes removed, with processing count for statistical and management with day cumulative number of accumulated counts, to support the functions of the printer, and production management. With an option for production angle iron flange production duct the double linkage Equipment 7mm flange.