FRMn.火室(框；频率计)FRabbr.故障率（=failure rate）abbr.故障记录（=faillure record）abbr.故障报告（=failure report）Frewinn.弗雷温Frenna弗雷纳Freidh弗赖德Fremer弗雷默Freiha弗雷哈Frenken.弗伦克Frl.abbr.=Fraulein 【德】女士Frumin乙拌磷Frt.n.货物Freire弗莱雷