Home / Standards / GB/T 12811-2025 GB/T 12811-2025 Active Test method for average cell size of rigid cellular plastics 硬质泡沫塑料平均泡孔尺寸试验方法 Standard Type GBT ICS 83.100 CCS G32 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A