FRESadj.耐火的
FRabbr.故障率(=failure rate)abbr.故障记录(=faillure record)abbr.故障报告(=failure report)
fruticeous lichen灌木状地衣
Frend's treatment
Fructus Tamarindi酸角
freon replacement氟里昂替代
freon refrigerant氟利昂制冷剂
Fresnel spotlight菲涅耳投光灯
Frenkel's symptom
Fructus forsythia连翘
Frege's principle
fresnel's biprism