Standard Specification for
Concrete Masonry Units for Construction of Catch Basins
and Manholes1
This trendy is issued under the constant designation c 139; the variety without delay following the designation indicates the yr of
original adoption or, within the case of revision, the year of final revision. a number of in parentheses suggests the 12 months of last reapproval. a
superscript epsilon (e) suggests a piece of writing alternate for the reason that ultimate revision or reapproval.
This fashionable has been authorised for use via organizations of the department of defense.
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