Home / Standards / GB/T 2927-1994 GB/T 2927-1994 Active Optical printing ratios forenlargement and reduction of motion-picture film images--specification 电影影片画幅放大或缩小光学印片比率技术要求 Standard Type GBT ICS 37.060 CCS A15 Status 现行 Issue Date 1994-12-28 Implementation 1995-08-01 Responsible Dept 国家电影局 Drafting Unit N/A