| 摘要 |
A ball-shaped caster assembly includes a wheel seat, and a wheel body rotatably mounted on the wheel seat. The wheel body includes a roller having two opposite sides, and two covers each mounted on a respective one of the two opposite sides of the roller. The roller and each of the two covers have an outer surface formed with a thin shell wall. Thus, the wheel body will not be deformed and can maintain its circularity during fabrication, so that the wheel body can be rolled smoothly and conveniently without incurring jump.
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