Standard Specification for Bronze Castings for Steam Locomotive Wearing Parts1
This fashionable is issued underneath the fixed designation b sixty six; the number without delay following the designation suggests the 12 months of original adoption or, inside the case of revision, the year of ultimate revision. various in parentheses indicates the 12 months of ultimate reapproval. a superscript epsilon (e) suggests a piece of writing trade because the ultimate revision or reapproval.
This preferred has been permitted for use via organizations of the branch of defense
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