| 摘要 |
PURPOSE: A folding method of a rear door for a truck is provided not to waste power by rotating and fixing the rear door in the side of the truck. CONSTITUTION: A rear door is fixed in the side or the floor of a vehicle to reduce the air resistance when the vehicle is advanced in empty. A hole is punched in the upper part of the rear door to pass through air for reducing the air resistance and the weight of the vehicle. Thereby, the life of an engine is extended, the air pollution is reduced and the power is saved.
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