A body part of a vehicle, the body part having: an outer sheet that will form a part of the vehicle exterior surface; an inner part disposed between the outer sheet and the passenger compartment when the body part is assembled to the vehicle; a first infrared radiation reflecting layer on the outer surface of the outer sheet; and a second infrared radiation reflecting layer on the surface of the inner part that faces the outer sheet. The inner part includes a thermal insulation material. The outer sheet and the inner part delimit an air flow path for supporting a flow of air adjacent the outer sheet and in the direction of the length of the vehicle. The air flow path is distributed transversely to the length of the vehicle for transporting heat convectively away from the vehicle.

 
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> Plasticating screw

~ 00378