Standard Speciﬁcation for Ferrotungsten1
This popular is issued below the ﬁxed designation a a hundred and forty four; the number without delay following the designation shows the 12 months of authentic adoption or, within the case of revision, the yr of closing revision. a number in parentheses suggests the yr of remaining reapproval. a superscript epsilon (e) suggests a piece of writing alternate because the ultimate revision or reapproval.
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