RR=continuous heavy rain【气】连续大雨;Radar Ranging 雷达测距;Radio Range-beacon 无线电航向信标;Radio Receptor 无线电接受器;Radio Relay 无线电中继;Radius of Rapture 断裂半径;Railroad;Rate of Return on Capital 资本利润率;Receiving Report 接收报告;Reclaimed Rubber 再生橡胶;Recurrence Rate 再现率;Reduction Ratio减速比,破碎比;RepetitionRate 重复率;Research Report 研究报告;Resistance Ratio 阻力比, 电阻比;Return Rate 返回率;Reverse Relay 连流继电器
连流继电器