efficiency index

annual efficiency index

GRAU index / GRAU-Index

azimuth-scale index / azimuth scale index

fighting capacity/efficiency

high aerodynamic efficiency

loss of efficiency

operational efficiency

restoring fighting efficiency

artillery fire efficiency

fighting efficiency

fire effectiveness (efficiency)

air efficiency

all-around efficiency

approach efficiency

ballistic efficiency

brake horsepower efficiency

increase of efficiency

indicated thermal efficiency

useful efficiency

high-efficiency engine

intrinsic efficiency

air burst advanced hit efficiency and destruction (AHEAD)

adiabatic efficiency

combustion efficiency

fuel efficiency

mechanical efficiency

overall efficiency

propulsive efficiency

volumetric efficiency

wind tunnel efficiency

aircraft efficiency charge

propeller efficiency