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International Standard Category: Iron and steel products in general

GB/T 221-2008    Notations for designation of iron and steel
钢铁产品牌号表示方法 ;
Category No.:77.140.01 Valid Status:valid
Issued Organization:AQSIQ, SAC Issued Date:2008-08-05
Implemented Date:2009-4-1 Abolished Date:
Superseded Standard.: Superseded Date:
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