| 摘要 |
A three wheeled trolley or pushchair has two rear wheels and at least one centrally positioned front wheel. The rear wheels are fitted to separate folding sets of support arms which for parallelograms or triangles, and which have one support arm on a sliding fit with the main support frame, to pull the wheels closer inwards for a compact storage and transport position. The carrying support, or seat, is slung from support arms which are hinge mounted at the front wheel mounting and whose rear ends are braced on the support frame by folding struts.
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