Standard Classification of
Coals by Rank1
This popular is issued underneath the constant designation d 388; the variety right away following the designation shows the year of
unique adoption or, within the case of revision, the yr of ultimate revision. quite a number in parentheses shows the year of closing reapproval. a
superscript epsilon (e) shows an article exchange for the reason that final revision or reapproval.
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[sdm_download id="5941" fancy="0" color="green"]
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