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key factor
gen.	ва́жіль m (засіб)
bus.styl.	вирішальний фактор
mil., logist.	визнача́льний чи́нник
scient.	головни́й крите́рій
English thesaurus
key factor
mil., logist.	Essential condition which has to be met for the success of the action which limits or directs it while taking into account the constraints and requirements identified during the mission analysis. (FRA)