| 摘要 |
A wheel assembly for a cart includes a wheel having an axle hole, a sleeve having a passage defined to communicate with the at least two cutouts in a distal end of the sleeve, an axle extending into the axle hole of the wheel and the passage of the sleeve, the axle having an annular groove to be exposed to the at least two cutouts of the sleeve after the axle is extended into the passage of the sleeve, and a clamp having two distal ends extending into the at least two cutouts to clamp a bottom face defining the annular groove.
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