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Database: 189760 (18 Oct 2025)
JJG 57-1984
Chinese Standard: 'JJG 57-1984'
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Standard Title (Description)
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Related Standard
JJG 57-1984
English
839
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Days<=6
(Optical dividing head test procedures)
JJG 57-1984
Obsolete
JJG 57-1984
SIMILAR
unprotected-true-PDFs:
JJF 1951-2021
JJG 818-2018
JJG 517-2016
JJF 1561-2016
JJG 1114-2015