How to construct air duct rubber and plastic insulation?
This method is formed by improving the rubber and plastic insulation of traditional galvanized steel air ducts. The core is to improve the cutting method of rubber and plastic insulation boards. The four sides of the air duct are cut from the whole board, and the four corners are cut and connected at 45° to ensure that the The four sides of the insulation layer are at right angles to reduce the bonding seam.
