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International Standard Category: Steel profiles

GB/T 4697-2017    Hot rolled steel section for mine timbering
矿山巷道支护用热轧型钢 ;
Category No.:77.140.70 Valid Status:valid
Issued Organization:AQSIQ, SAC Issued Date:2017-07-12
Implemented Date:2018-4-1 Abolished Date:
Superseded Standard.: Superseded Date:
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