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Return chain drive e.g. for bicycle, passes chain over pair of smaller diameter bottom bracketed sprockets and pair of larger diameter rear sprockets
Return chain drive e.g. for bicycle, passes chain over pair of smaller diameter bottom bracketed sprockets and pair of larger diameter rear sprockets
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机译：反向链传动例如用于自行车，将链条穿过一对直径较小的底部带支架链轮和一对直径较大的后部链轮
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摘要
The chain drive has a pair of smaller diameter bottom bracketed sprockets (4) and a pair of larger diameter rear sprockets (2,3) and a chain passed over both pairs.
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