| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB 7793-1987 | English | 199 |
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Days<=2
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Hygienic standard of lighting and illumination in elementary and middle school
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GB 7793-1987
| Obsolete |
GB 7793-1987
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