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PGNCS abbr.stresses
astronaut. основная система наведения, навигации и управления (сокр. от "primary guidance, navigation and control system" Alex_Odeychuk)
 English thesaurus
PGNCS abbr.
abbr., mil., avia. primary guidance, navigation and control subsystem; primary guidance, navigation and control system
tech. primary guidance, navigation and control system