Flange plate variety of materials, specifications, thickness should be consistent with the design and the current national product standards, the product will roll duct under the pipeline directly through the material, shaped, galvanized duct board model, the production process without having to repeat galvanized duct board, I galvanized sheet metal duct Products: galvanized metal duct is galvanized steel as the main raw material, through seams, machining molding, galvanized duct board manufacturers, with convenient on-site production , both can be designed, and is the traditional ventilation and air conditioning pipes, galvanized duct board types, and with the development of technology, from the previous hand-made changes to the current full mechanization of production, with high efficiency, precision machining size and so on. Galvanized sheet duct _ _ galvanized Yanda air conditioning duct board Photo by Wu County Yanda air-conditioning plant. Galvanized sheet duct _ _ galvanized Yanda air conditioning duct board image is Wu County Yanda air-conditioning plant (www.wcydkt.com) (www.wcydkt.com) this year introduced a new upgrade, the above picture is for reference Please call the telephone or pictures on this page, for the latest information, contact: Wu Yusong.