Folding bicycle:
A folding bicycle is a bicycle designed to fold into a compact form, facilitating transport and storage.
en.wikipedia.org
折叠车:
折叠车是可折叠的自行车，俗稱小折，大小从12寸到26寸不等，最常见的是16寸、20寸的。
zh.wikipedia.org
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Folding bicycle折叠车