RRabbr.无线电航向信标(Radio Range-beacon);无线电接受器(Radio Receptor);阻力比(Resistance Ratio);连流继电器(Reverse Relay)
Rrecreational noise娱乐噪声
Rrural public goods农村公共品
rrow-band antenna窄带天线
rrestrial telescope正像望远镜,地面望远镜,大地望远镜
Rrivet interference干涉配合
RRR-a-tocopherol天然维生素E
Rrespiraxory failure呼吸衰竭
Rrestoration measure恢复措施
Rrespiratory failure呼吸衰竭
rrow-band analyser窄带分析器