Home / Standards / GB/T 23456-2025 GB/T 23456-2025 Upcoming Phosphogypsum 磷石膏 Standard Type GBT ICS 91.100.10 CCS Q 62 Status 即将实施 Issue Date 2025-12-02 Implementation 2026-07-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A