单词	受限数据名称
释义	同限定数据名称--受限数据名称
随便看	primary filter element primary filtrate primary fire control primary (fission) primary fission primary (fission) fragment primary fission frag-ment primary fission fragment primary fission-neutron primary fission-neutron--energy primary fission pro-duct primary fission product primary fission yield primary fission--yield primary fissure primary flat primary flat joints primary flaw primary flexure primary flexure--chief flexure primary flexure (or chief flexure) primary flight primary flight control primary flight control (pfc) primary flight control system