Home / Standards / GB/T 13157-1991 GB/T 13157-1991 Active Overall electro-acoustic frequency response for reproduction of 35mm optical sound track--Reproduction characteristics 35 mm影片光学声迹的还音电声频率响应特性 Standard Type GBT ICS 37.040.10 CCS A15 Status 现行 Issue Date 1991-09-16 Implementation 1992-06-01 Responsible Dept 国家电影局 Drafting Unit N/A