Standard Specification for Niobium and Niobium Alloy Seamless and Welded Tubes1
This fashionable is issued beneath the fixed designation b 394; the number at once following the designation shows the yr of original adoption or, in the case of revision, the year of ultimate revision. Quite a number in parentheses indicates the 12 months of remaining reapproval. A superscript epsilon (e) shows a piece of writing exchange for the reason that last revision or reapproval.
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