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International Standard Category: Abrasives

GB/T 2491-2003    Bonded abrasive products―Hardness grade measurement by rockwell tester
普通磨具 洛氏硬度计检验硬度的方法 ;
Category No.:25.100.70 Valid Status:superseded
Issued Organization:AQSIQ Issued Date:2003-10-08
Implemented Date:2004-4-1 Abolished Date:
Superseded Standard.:GB/T 2490-2007 Bonded abrasive products—Hardness grade measurement
Superseded Date:2007-11-1
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