Standard Speciﬁcation for Tin Mill Products, Black Plate Electrolytic chromium coated, Single and Double Reduced1
This trendy is issued under the ﬁxed designation a 657/a 657m; the quantity without delay following the designation suggests the 12 months of unique adoption or, within the case of revision, the year of final revision. Quite a number in parentheses indicates the yr of last reapproval. A superscript epsilon (e) shows a piece of writing change because the ultimate revision or reapproval.
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