Description
Class B64C : AEROPLANES; HELICOPTERS
Subclass 1/08: Fuselages; Constructional features common to fuselages, wings, stabilising surfaces, or the like (aerodynamical features common to fuselages, wings, stabilising surfaces, or the like B64C 23/00; flight-deck installations B64D) Frames; Stringers; Longerons Geodetic or other open-frame structures