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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 23572-2009 |
Hydraulic system general specifications for metel-cutting machine tools 金属切削机床 液压系统通用技术条件 |
China National Standards metel |
 English PDF |
| GB/T 13320-2007 |
metellographic grading atlas and assessing method for steel die forgings 钢质模锻件 金相组织评级图及评定方法 |
China National Standards metel |
English PDF |
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