Home / Standards / GB/T 41978-2022 GB/T 41978-2022 Active Additive manufacturing—Test method for hollow particle ratio of metal powders 增材制造 金属粉末空心粉率检测方法 Standard Type GBT ICS 25.030;77.160 CCS H71 Status 现行 Issue Date 2022-10-12 Implementation 2022-10-12 Responsible Dept 中国机械工业联合会 Drafting Unit N/A