Standard Practice for
Use of the Electric and Electronic Typewriter as a Test
This vast is issued beneath the regular designation f 497; the extensive variety proper now following the designation suggests the year of
authentic adoption or, within the case of revision, the 12 months of remaining revision. a number of in parentheses shows the 12 months of final reapproval. a
superscript epsilon (e) suggests an article trade due to the fact the closing revision or reapproval.
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