Classification of multi-channel radiotelegraph systems for long-range circuits operating at frequencies below about 30聽MHz and the designation of the channels in these systems
发布日期
1963-07-01
实施日期
全文上线日期
2013-06-17 15:28:32
页数
2
起草单位
起草人
归口单位
中国标准分类
国际标准分类
摘要
适用范围
关键词
标准状态
已撤消
相关公告
运行于30MHz以下频率的远程电路的多信道无线电报系统的分类和系统中信道的指配Classification of multi-channel radiotelegraph systems for long-range circuits operating at frequencies below about 30聽MHz and the designation of the channels in these systems