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EFO abbr.
abbr.	Error Freak And Oddity; European Field Office
abbr., dril.	Extended Flange Outlet (YMedentsii)
abbr., el.	error-free operation
abbr., el., scient.	Electronic flame-off
abbr., fin.	Enterprise Finance Organization (Nina_Strogonova)
abbr., mil., air.def.	electronic frequency office
abbr., mil., avia.	error free operation
energ.ind.	equipment-forced outage
tech.	equipment forced outage
EfO abbr.
abbr.	Earnings from Operations (zemike)