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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 17739.4-2008 |
Microfilming of technical drawings and other drawing office documents - Part 4:Microfilming of drawing of special and exceptional elongated sizes 技术图样与技术文件的缩微摄影 第4部分：特殊和超大尺寸图样的拍摄 |
China National Standards elongated |
 English PDF |
| GB/T 12620-2008 |
Round and elongated apertures with round and square plate screens 长圆孔、长方孔和圆孔筛板 |
China National Standards elongated |
English PDF |
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