pedal crank
... pedal circuit 踏板电路 pedal crank 踏板曲柄 pedal cross shaft 踏板横轴 ...
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自行车的踏板与曲柄相连。
The pedals of a cycle are attached to a crank.
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The pedal of a cycle is attached to a crank.
单独使用滚轮时，可在并列或者前后串列的两个滚轮的转轴装上 曲柄，曲柄顶端有踏板轴。
When using the idler wheel only, fix the brace on the axes of the two idler wheels in paratactic or in series and the top of brace has footplate axes.
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