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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 39428-2020 |
Steel castings by sand casting—Visual examination method of surface quality 砂型铸钢件 表面质量目视检测方法 |
China National Standards Steel Examination by |
 English PDF |
| GB/T 4236-2016 |
Steel Examination by sulphur print(Baumann method) 钢的硫印检验方法 |
China National Standards Steel Examination by |
English PDF |
| GB/T 4236-1984 |
Steel--Examination by sulphur print (Baumann method) 钢的硫印检验方法 |
China National Standards Steel Examination by |
English PDF |
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