A sprocket (212) includes a hub and a plurality of teeth projecting radially outwardly from the hub.

一个链轮(212)包括一个轮毂和多个从轮毂径向向外突出的齿。

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A sprocket (212) includes a hub and a plurality of teeth projecting radially outwardly from the hub.

一个链轮(212)包括一个轮毂和多个从轮毂径向向外突出的齿。

youdao