| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 2831-1981 | English | 679 |
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Days<=5
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Surface form deviation of optical elements--Inspection methods
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GB/T 2831-1981
| Obsolete |
GB/T 2831-1981
|