前 言 本欧洲标准由欧洲电工技术标准化委员会TC20 电力电缆的12 工作组铁路电缆，拟定，该标准是欧洲电工技术标准化委员会的TC9X（铁路应用电气与电子设备）总集中的部分篇章。 该标准的草稿文本曾经过特殊的认可程序，并于2002 年6 月1 日获欧洲电工技术标准化委员会批准为EN 50306-2 标准。 国际标准协会 王斌 以下日期规定必须执行： - 或者刊发与本EN 标准完全相同的国家标准或发布完全认同本EN 标准的最后日期 （dop）2003 年7 月1 日 - 撤销与本EN 标准有抵触的国家标准的最后日期 核准复印文件：英国标准协会专利（非控制性复印件），2003年8月4日，中国标准信息交换中心/（dow ）2008 年7 月1 日 标有“资料性的”（“informafive”）字样的附件，只能作信息资料之用。 在本标准中，附录 A 及附录 B 属于信息性附录。 -3- EN 50306-2:2002 核准复印文件：英国标准协会专利（非控制性复印件），2003年8月4日，中国标准信息交换中心/国际标准协会 王斌 ···································································································································································································································································································································································································································································································································································································...
