Flange corner also known as common flange air duct hook code, or common flange air duct hook code, is a corner code fitting made of galvanized steel for fixing and connecting in the production process of common flange air duct. It is in a 90 degree right angle shape, and there is an ellipse with a length of 8mm and a width of 10mm at the corner, which is used to connect the air duct through screws, It is a necessary accessory for the production of common plate flange air duct.
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