Standard Speciﬁcation for Steel Wire, Hard Drawn for Prestressing Concrete Pipe1
This fashionable is issued beneath the ﬁxed designation a 648; the wide variety at once following the designation suggests the 12 months of unique adoption or, in the case of revision, the 12 months of final revision. More than a few in parentheses suggests the year of closing reapproval. A superscript epsilon (e) suggests an article change because of the final revision or reapproval.
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You can also get ASTM A 646 – 95 International standard