| 摘要 |
A substrate upon which an advertising message may be printed is releasably attachable to the side of a truck in a way that prevents the substrate from flapping when the truck is moving at high speeds. The upper edge of the substrate is retained within a rigid frame mounted in a recess formed in the side wall of the truck, and is quickly insertable into or removable from such rig id frame. The forward edge of the substrate is wrapped around the forward corne r of the truck and secured. The rearward edge of the substrate is wrapped arou nd a rear corner of the truck. A plurality of winches mounted on the underside of the truck engage straps that hold the lowermost edge of the substrate and pulls the lowermost edge toward those winches to further remove slack from the substrate.
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