freq[电] 频率
FRabbr.故障率(=failure rate)abbr.故障记录(=faillure record)abbr.故障报告(=failure report)
Fregata minor Lesser Frigate Bird小军舰鸟
Fre-quency Analysis and Control频率分析与控制
Fresnel straight edge diffraction菲涅耳直边衍射
frequence of infinite attenuation[信]无限衰减频率
Fructus Hordei Germinatus tablets
frenulum veli medullaris superius上髓帆系带
frenulum veli medullaris superior颅侧髓帆系带
fre-quency division multiplexing频分复用