Home / Standards / GB/T 40067-2021 GB/T 40067-2021 Active Microstructure and defect determination of tungsten carbide powder 碳化钨粉末微观组织及缺陷检测方法 Standard Type GBT ICS 77.160 CCS H24 Status 现行 Issue Date 2021-05-21 Implementation 2021-12-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A