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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 226-2015 |
Test method for macrostructure and defect of steel by etching 钢的低倍组织及缺陷酸蚀检验法 |
China National Standards Etch test macrostructure |
 English PDF |
| GB/T 226-1991 |
Etch test for macrostructure and defect of steels 钢的低倍组织及缺陷酸蚀检验法 |
China National Standards Etch test macrostructure |
English PDF |
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