| 摘要 |
A treadmill includes a frame, two rollers, and an endless belt. The frame is placed on a ground and has a left plate and a right plate. The rollers have two opposite ends pivoted between the left plate and the right plate, and the endless belt is wound around the rollers. The left plate and the right plate are provided with a protective layer a top side thereof respectively. The protective layers may prevent unwanted injuries once if the user falls while using the treadmill.
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