... based on product use,1.GB/T6892-2000 "industrial aluminum and aluminum alloy extruded profiles"2.GB5237.1-2004 "aluminum alloy ... . product variety(1) window profiles, 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 on your specific design requirements. 2.Alloy state6063T5 ...