单词	tracing wheel
释义	tracing wheel noun : a usually toothed wheel with a handle that is used on tracing paper to trace a pattern Word History First Known Use circa 1891, in the meaning defined above
随便看	boaking boaks boal boanns boar boar grunt boar's nest board board and lodging board around board book board boy board check board cloth board company board drop hammer board foot board game board games board hole board lot board measure board mill board of commissioners board of directors

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