Ключевые слова: afghanistan, air, architecture, azerbaijan, beam, belarus, britain, building, cage, canada, ceiling, conduit, construction, cuba, day, duct, facility, fitting, flag, framed, france, germany, great, grill, hang, indoors, installation, japan, kyrgyzstan, mongolia, national, nobody, russia, skeleton, sports, stadium, state, structure, suspension, turkey, turkmenistan, ukraine, usa, vent, ventilating,