NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 4637-1994
Head gaps andsound records for three-，four-，or six-track magnetic sound records on 35mmmotion-picture film containing no picture--Positions and width dimensions 35mm磁片上三声轨、四声轨和六声轨磁头隙缝的位置和宽度尺寸
Issued Date:1994-12-28
Implemented Date:1995-08-01
Issued by:
The Standardization Administration of the People's Republic of China
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