Description
Class B64F : GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS
Subclass 1/315: Ground or aircraft-carrier-deck installations (specially adapted for captive aircraft B64F 3/00; aircraft-carriers B63; fog-dispersal installations E01H; wind tunnels G01M; grounded flight trainers G09B) for embarking or disembarking passengers Mobile stairs (movable stairways in general E04F 11/04)