... 双向拉伸 two-way stretch 双向旋转泵 reversed pump 双向水流洗涤方式 two water action ...
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reversed flow diverter pump 可逆流体转换泵
reversed pump
反向泵
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Hydro dams can be reversed and pump water uphill so that the next day, when gravity pulls the water back down, the turbines spin to make electricity.
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