Patent AT-E400338-T1: [Translated] MULTI-PURPOSE YO-YO
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https://catalog.data.gov/dataset/patent-at-e400338-t1-translated-multi-purpose-yo-yo
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资源简介：
A multi-function yo-yo switchable between operation as a fixed-axle yo-yo, a free-axle yo-yo, and a centrifugal-clutch yo-yo (i.e., a yo-yo which operates as a free-...
