Home / Standards / GB/T 40139-2021 GB/T 40139-2021 Active Measuring method for surface areas of materials—Three dimensional area measurement base on hyperspectral imaging 材料表面积的测量 高光谱成像三维面积测量法 Standard Type GBT ICS 71.040.50 CCS G 31 Status 现行 Issue Date 2021-05-21 Implementation 2021-09-01 Responsible Dept 国家标准委 Drafting Unit N/A