FRabbr.故障率（=failure rate）abbr.故障记录（=faillure record）abbr.故障报告（=failure report）Freu弗勒FRESadj.耐火的FREBabbr.=Federal Real Estate Board 联邦不动产委员会；Federal Real Estate Board 联邦房地产理事会Freg弗雷格FRFTFlight Readiness Firing Test 导弹飞行准备发射试验Frel弗雷尔freq[电] 频率Freh弗雷FRRC=Flow-Recording Ratio Controller 流量记录比例控制器FRFF分数傅里叶变换