Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes1
This popular is issued under the fixed designation a 179/a 179m; the wide variety without delay following the designation shows the 12 months of original adoption or, within the case of revision, the yr of last revision. a number in parentheses shows the year of closing reapproval. a superscript epsilon (e) suggests a piece of writing exchange for the reason that ultimate revision or reapproval.
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