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Database: 189759 (19 Oct 2025)
GB/T 7997-2014
Chinese Standard: 'GB/T 7997-2014'
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GB/T 7997-2014
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Days<=3
Hard metals -- Vickers hardness test
GB/T 7997-2014
Valid
GB/T 7997-2014
SIMILAR
unprotected-true-PDFs:
GB/T 44237-2024
GB/T 38516-2020
GB/T 6885-2020
GB/T 5243-2020
GB/T 2079-2015