| 摘要 |
An airfoil-shaped silencer is on the roof of a vehicle used for pulling a payload, such as a tractor-trailer combination. The leading edge of the silencer is lower than the trailing edge of the silencer. The trailing edge of the silencer includes an elongate discharge aperture which extends in the direction of the width of the vehicle. The silencer is connected to an exhaust pipe, which may pass through the body of the vehicle to provide climate control.
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