Home / Standards / GB/T 46200-2025 GB/T 46200-2025 Active Determination of coefficient of linear thermal expansion of fiber reinforced polymer matrix composites at ultra-low temperature 纤维增强聚合物基复合材料超低温线膨胀系数的测定 Standard Type GBT ICS 83.120 CCS Q23 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A