... product use,1.GB/T6892-2000 "industrial aluminum and aluminum alloy extruded profiles"2.GB5237.1-2004 ... , 53 series doors and windows (common type and insulation type); 45,53 Series Swing, free door.(2)wall profiles,120 ... ,155,185,200 series of fully implicit and semi-hidden wallBased ... Part 6: thermal barrier profiles " Window and Door Aluminium extrusions