gyroscopic reference unit (GRU)
гіроскопічний задавальний елемент
гіроскопічний задавальний елемент
Main Intelligence Directorate (GRU)
fixed ring (of a gyroscopic sight)
attitude-and-heading reference system / attitude and heading reference system (AHRS)
battery coolant unit / battery-coolant unit (BCU)
gear reduction unit / gear-reduction unit
position and navigation unit / position navigation unit (PNU)