| 摘要 |
A shopping trolley 12 has its front castors 15 connected together by a tension spring 17 in such a way that the spring force biases the castor wheels towards the straight ahead position whilst still allowing sideways movement by the application of a force to the side of the trolley. A means is provided to lift the front wheels clear of the ground when the trolley is nested in a group of stacked trolleys. <IMAGE>
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