Standard Guide for Measurement of Thin Chromium Coatings by Spot Test1
This wellknown is issued under the fixed designation b 556; the wide variety straight away following the designation suggests the 12 months of unique adoption or, within the case of revision, the year of ultimate revision. A number in parentheses indicates the 12 months of ultimate reapproval. A superscript epsilon (e) shows a piece of writing exchange because the last revision or reapproval.
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You can also get ASTM B 555 – 86 International standard
