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forces acting on airfoils in motion relative to the air (or other gaseous fluids)

forces acting on airfoils in motion relative to the air (or other gaseous fluids)

the inside lower horizontal surface (as of a room, hallway, tent, or other structure)

the inside lower horizontal surface (as of a room, hallway, tent, or other structure)

the inside lower horizontal surface (as of a room, hallway, tent, or other structure)