1960 ., air force, and, any, art, aviation, beginning, being developed, bomber, civil, complex, design bureau, developed by, developer, division, dry, execution, fighter, fire, freeboard, front, generation, helicopters, high-precision, history, is part of, is used, land, list of, mass, mi- 8, mil, multi-purpose, oak, of 50, of the day, of the fifth, pak-fa, performs, perspective, plane, purpose, replacement, russia, russia ., sets, soviet, su- 34, su-27, the world, time, top, twin-engined, under development, very