TDF flange plate system is the total international production of flanged duct one of the two systems, it has a low cost, good sealing performance, easy installation, simple features, is particularly suitable for small duct cross-section area of ??production, TDF were plate flange system can be used to plant large-scale industrial production, is a high efficiency of the air duct flange system of the new design, TDF flange machine and reel were bone plate machine, cutting machine angle, combination beading machines the formation of the fully automated production, can also be grouped, with machinery to the site construction, ideal for the needs of domestic construction enterprises. Mechanical Installation Association of China won the "Science and Technology Progress Award."