fr
英
美
- abbr.故障率(=failurerate)abbr.故障记录(=faillurerecord)abbr.故障报告(=failurereport)
- fr abbr.故障率(=failurerate)abbr.故障记录(=faillurerecord)abbr.故障报告(=failurereport)
- FR-NB n.段号
- Fr-number 弗劳德数
- Fr.Gu. abbr.=FrenchGuiana法属圭亚那
- fra n.兄弟(对意大利和尚或托钵僧的称呼)abbr.(美国)联邦铁路局(=FederalRailroadAdministration)abbr.(美国)联邦储备法(=FederalReserveAct)
Noun:
-
a radioactive element of the alkali-metal group discovered as a disintegration product of actinium