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Recent content by phagan7

  1. phagan7

    Question about Tractor Traliors

    I have often wondered about the small circular objects on the sides of some tractor trailers. There are usually two rows and one column per 3ft panel. They stuck out about 2 inches from the trailor surface. Do the serve an aerodynamic purpose? Any help would be appr. phagan7@aol.com
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