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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| 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 |
China National Standards Head gaps andsound |
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