Aluminum profile for Door & Window 1060,6a02,6005,6063 T5,T6 ... "2.GB5237.1-2004 "aluminum alloy extruded profiles for architecture Part 1, Substrate "3.GB5237.2-2004 ... quality standard of architectural profiles1. product variety(1) window profiles, 53 series doors and windows (common type ... standards1, GB5237.1-2004 "aluminum alloy extruded profiles for architecture Part 1: Substrateā2, GB5237.2-2004 ...