(under the class definition) Structure which has a curvilinear cross-section peculiar to the reduction of wind resistance generally termed air foils or streamlined.
SEE OR SEARCH THIS CLASS, SUBCLASS:
245+, for a structure having or formed by a curvilinear barrier.
SEE OR SEARCH CLASS
244, Aeronautics,
123+, for an aircraft airfoil construction.
343, Communications: Radio Wave Antennas, 887, for an antenna support with a streamlined cross-section.
