| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB 1321-1977 | English | 199 |
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Days<=2
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Optical parts, vacuum coated with outer high-reflection film of aluminum and reinforced by anodic oxidation
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GB 1321-1977
| Obsolete |
GB 1321-1977
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