| 摘要 |
A tonneau cover for a pick-up truck cargo box in which a flexible cover of sheet-like material is attached to a frame with snap fasteners. The snap portions carried by the frame are slidable there along to change the position of the snap fastener. The snap fasteners include a protrusion, which engages the frame and creates sufficient force to prevent the snap fastener from sliding freely along the rail and losing their longitudinal location when the tonneau cover is not attached.
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