When the back wheel of the bicycle is rotated, it drives the drive gear and then forces the centrifugal pump to operate and pump water.
当自行车后轮转动时，带动传动齿轮并驱动了离心泵运转抽水。
When the back wheel of the bicycle is rotated, it drives the drive gear and then forces the centrifugal pump to operate and pump water.
当自行车后轮转动时，带动传动齿轮并驱动了离心泵运转抽水。
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