| 摘要 |
<p>A front wall of a trailer in a tractor trailer combination is formed in the shape of an aerodynamic fairing comprising an upper portion thereof which includes surfaces merging from the side and top walls of the trailer following parabolic curves and converging at a point of maximum projection just behind the cab of the tractor. A central vertical section under the upper section which is a constant cross section of parabolic outline and a lower section which is recessed from the central section and includes a downwardly and rearwardly sloping surface merging with a lower flattened surface.</p> |
