Standard Speciﬁcation for Seamless and Welded Zirconium and Zirconium Alloy Tubes1
This trendy is issued under the ﬁxed designation b 523/b 523m; the number right now following the designation suggests the year of authentic adoption or, in the case of revision, the yr of closing revision. A number of in parentheses indicates the yr of closing reapproval. A superscript epsilon (e) shows a piece of writing alternate because the final revision or reapproval.
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