Standard Specification for Steel Wire, Music Spring Quality
This general is issued beneath the fixed designation a 228/a 228m; the range right now following the designation suggests the 12 months of authentic adoption or, inside the case of revision, the yr of final revision. various in parentheses suggests the year of ultimate reapproval. a superscript epsilon (e) indicates an editorial exchange since the remaining revision or reapproval.
This widespread has been authorised to be used by agencies of the department of protection.
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