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Database: 189760 (22 Jan 2022)
YB 421-1977
YB 421-1977_English: PDF (YB421-1977)
Standard ID
Contents [version]
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Google Book
YB 421-1977
English
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3 days
(Chinese Industry Standard)
YB 421-1977
Obsolete
YB 421-1977
BASIC DATA
Standard ID
YB 421-1977 (YB421-1977)
Description (Translated English)
(Chinese Industry Standard)
Sector / Industry
Ferrous Metallurgy Industry Standard