Home / Standards / GB/T 7428-1994 GB/T 7428-1994 Abolished Head gaps for two sound records on 16mm magnetic film--Positions and width dimensions 16mm磁片上两声轨磁头隙缝的位置和宽度尺寸 Standard Type GBT ICS 33.160.30 CCS A15 Status 废止 Issue Date 1994-12-28 Implementation 1995-08-01 Responsible Dept 广电总局 Drafting Unit N/A