CRn.镉比值(呼叫率；阻容；托架折回)CRDF=Cathode-Ray Direction Finding 阴极射线测向机CRASn.编码和随机存取开关Craen.克雷credn.可靠性；可信性Crean.克雷CRLB克拉美罗限CRJE=Conversational Remote Job Entry 会话式远程作业输入CRCPCertificate of the Royal College of Physicians 皇家内科医生学院证书crak裂缝cronn.克龙(时间单位；等于百万年)n.一个linux下的定时执行工具