. "experimental design bureau" . "design bureau" . . . "OKB-19" . . "OKB MEI" . "Soviet military aircraft designers" . . . "Design Bureaus" . "OKB-794" . . . "OKB-18" . . . . . "NPO" . . . "OKB" . . "Experimental Design Bureau" . "the Design Bureaus" . "Design Bureau" . "design bureaus" . . "Yakovlev OKB" . . . . "OKB-24" . . . "design bureau OKB-293" . "''OKB-19'' design bureau" . . "OKB-19 design bureau" . . "OKB" . . "OKB-1" . . "design office" . . . . "OKB-4" . "OKB-153" . . . "design bureaux" . "Soviet design bureau" . "OKB-478" . . "OKB-30" . . . . "KB" . .