| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB 7428-1987 | English | 199 |
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Days<=2
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Location and width of the recording head gap for edge sound records on 16mm perforated magnetic film
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GB 7428-1987
| Obsolete |
GB 7428-1987
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