求翻译：This standard is issued under the fixed designation B 152/B 152M; the number immediately following the designation indicates the year是什么意思？

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悬赏分：1 - 离问题结束还有

This standard is issued under the fixed designation B 152/B 152M; the number immediately following the designation indicates the year

问题补充：

匿名	2013-05-23 12:26:38 本标准根据固定指定 152 B 发出 152 米；紧接指定的数字表示年份

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