+ Put two aluminum window materials that have been cut into 45 degrees, use the corner code placed in the window, move the striker, and squeeze the two window materials tightly to form a 90 degree angle. According to the corner code characteristics, the machine can be designed as a single-sided four-point collision, so the extrusion is more firm. Due to the increased size and impact force, it is especially suitable for heat-insulating frame materials, fan materials and door materials, as well as ultra-thick curtain wall materials. Group angle.