The equal pressure sealing strip is the key to the sealing quality of the broken bridge window. Due to the compression capacity of the sealing strip of the cabinet window sash, a certain closing force is already required when the doors and windows are closed. If the interference fit of the equal pressure sealing strip is required unilaterally, there will be a phenomenon of difficulty in closing the window; Therefore, when the doors and windows are closed, a slight deformation of part B is sufficient, and the interference fit of part B is 1-2mm. And when selecting hardware, the thickness of the hinges should be consistent with the manufacturer's design, otherwise it may easily lead to the sealing effect of the sealing strip or the inability to close the window sash