ASTM D 720 – 91 International standard

Standard Test Method for Free-Swelling Index of Coal1

This preferred is issued under the fixed designation d 720; the variety right now following the designation indicates the yr of unique adoption or, in the case of revision, the yr of ultimate revision. A number of in parentheses indicates the 12 months of ultimate reapproval. A superscript epsilon (e) shows a piece of writing exchange for the reason that remaining revision or reapproval.

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