Home / Standards / GB/T 45921-2025 GB/T 45921-2025 Active Organic-electrochromic laminated glass used in buildings 建筑用有机电致变色夹层玻璃 Standard Type GBT ICS 81.040.30 CCS Q 33 Status 现行 Issue Date 2025-06-30 Implementation 2026-01-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A