The utility model relates to a central air-conditioning vent grille, including frame, blade, connecting shaft, characterized in that: the frame has a number of axial bore, the shaft connecting shaft hole, Grille wholesale, within the frame of on the side of the shaft hole has a rib, a groove in the outer surface of the shaft hole of the frame, the outer ear is located within the recess of the connecting shaft. The utility model has the advantage of stability of the blade, rotating flexible, Grille, no noise at work. Duct, a pipeline system for air transport and distribution. There are two composite duct pipe and inorganic air. Duct according to the sectional shape and material classification. Air duct production of stainless steel tube production is sewn seams, rivet joints, flange flange gap at the corners, etc. Apply sealant (such as neutral plastic glass). Should remove surface dust and grease before applying sealant. Press the cross-sectional shape, the wind can be divided into round duct, rectangular duct, oval duct other, Qianjiang Grille, where the round duct of least resistance, the height of the largest production complex. So the application of a rectangular duct based. Material, duct can be divided into metal duct, composite duct, polymer duct. Qianjiang Grille | Wuhan Han Wei Li Yuen Grille | Grille company by the well-being of Equipment Co., Ltd. Wuhan Han Wei Li Yuen. Qianjiang Grille | Wuhan Han Wei Li Yuen Grille | Grille company Wuhan Han Wei Li Yuen-being of Equipment Co., Ltd. (www.whhwly.com) this year introduced a new upgrade, the above picture is for reference only, please dial this page Phone or pictures on obtain the latest information, contact: Jingli.