Standard Speciﬁcation for Aluminum and Aluminum-Alloy Seamless Condenser and Heat-Exchanger Tubes with Integral Fins1
This wellknown is issued beneath the ﬁxed designation b 404/b 404m; the number without delay following the designation suggests the year of unique adoption or, in the case of revision, the yr of remaining revision. Various in parentheses suggests the year of remaining reapproval. A superscript epsilon (e) indicates a piece of writing trade because the final revision or reapproval.
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