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本标准以固定代号 E499颁发,代号后面的数字表示最初采用的年份,若经修订,则表示最近修订的年份。括号内的数字表示最近重新审定的年份。右上角之符号表示最后一次修订或审定后在版面上的变动。
This standard is issued under a fixed code E499. The numbers following the code indicate the year of initial adoption and if revised, the year of the latest revision. Figures in parentheses indicate the year of recent revalidation. The symbol in the upper right corner indicates the changes on the layout since the last revision or validation.