[Jie Weinuo Industrial Star recommendation spiral duct] spiral duct leakage pipe so that the junction to minimize spiral duct, a typical spiral duct length is 3 ~ 6m spiral duct outlets, while the typical rectangular duct length of only 1 to 1.5 meters long. [Jie Weinuo Industrial Star recommendation - spiral duct] Jie Weinuo spiral duct seams precision molding even with three to five years, making the surface of the galvanized steel from damage, greatly extending the life of the spiral duct . Spiral duct quality | Huairou spiral duct | Tongzhou spiral duct selected by 捷维诺 捷维诺 Industrial (Tianjin) Co., Ltd. Jie Weinuo (Tianjin) Co., Ltd. (www.tjjwnsy.com) strong, credible, in Tianjin fans, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jie Weinuo Industrial and you hand into the brilliant, for a better future!