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International Standard Category: Mechanical testing of metals

GB/T 7997-1987    Hardmetals; Vickers hardness test
硬质合金维氏硬度试验方法;
Category No.:77.040.10 Valid Status:superseded
Issued Organization:0 Issued Date:1987-1-26
Implemented Date:1988-3-1 Abolished Date:
Superseded Standard.:GB/T 7997-2014 Hardmetals―Vickers hardness test
Superseded Date:2015-2-1
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