| 摘要 |
A vertically adjustable mast is removably positioned behind the cab of the truck which is to be towed. The lower end of the mast is mounted on the frame members of the truck frame. A pair of wing members are pivotally mounted on the upper end of the mast to permit the wing members to be folded into an inoperative position or folded outwardly to an operative position. A flexible, substantially wedge-shaped air deflector is operatively secured to the upper end of the mast and extends rearwardly and downwardly therefrom for connection to the truck so that air will be prevented from entering into the interior of the drag reducer mounted on the truck roof when the truck is being towed rearwardly.
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