推荐性国家标准废止采标
GB/T 4644-1984
单边片孔单条16mm影片的磁性声带的录音与还音磁头的隙缝位置和宽度尺寸
Magnetic stripes and recording and reproducing head gaps for magnetic sound recordson 16mm motion-picture film perforated along one edge--Positions and width dimensions
- 实施日期
- 1985-05-01
- ICS 分类
- 37.060.20