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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB 27995.2-2011 |
Semi-finished spectacle lens blanks - Part 2: Specifications for progressive power lens blanks 半成品眼镜片毛坯 第2部分：渐变焦眼镜片毛坯规范 |
China National Standards Semi finished spectacle |
 English PDF |
| GB 27995.1-2011 |
Semi-finished spectacle lens blanks - Part 1: Specifications for single-vision and multifocal lens blanks 半成品眼镜片毛坯 第1部分：单光和多焦点眼镜片毛坯规范 |
China National Standards Semi finished spectacle |
English PDF |
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