标题: 请问一下EN前言里的这两句，是什么意思？ [打印本页] 作者: voculy 时间: 2011-9-10 20:53 标题: 请问一下EN前言里的这两句，是什么意思？ - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement
- latest date by which the national standards conflicting with the EN have to be withdrawn