Home / Standards / GB/T 13986-1992 GB/T 13986-1992 Abolished Photoelectric method for measuring exposure in focal planes of camera 照相机焦平面曝光量的光电测量方法 Standard Type GBT ICS 37.040.10 CCS N40 Status 废止 Issue Date 1992-12-19 Implementation 1993-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A