| 摘要 |
A tailgate is attached to a truck bed in a vertical position across the opening. A rear shaft and a front shaft extend across the truck bed, and a pair of chains travel around sprockets near each end of the rear shaft and the front shaft. A motor rotates the front shaft to move the chains, thus moving the tailgate upward and forward through the truck bed. The tailgate can be temporarily attached to the sides of the truck bed in a selected position, or it can be raised into a spoiler position. The tailgate may also be manually operable between positions.
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