pumping action

By taking the stagnation action of flow into consideration, the analytical solutions for computing drawdown and pumping rate is derived under the conditions of homogeneous, isotropical unconfined aquifer without recharge and of fixed drawdown in the pumping well.

文中推导出了在均质各向同性无上、下补给、定降深抽水条件下，考虑滞流作用时的变边界井流问题水位降落曲线及井的出水量的解析公式。

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Owing to the totally elimination of the throttling action to the air inflow, this kind of unthrottled SI engine can greatly decrease the pumping loss, which makes the fuel consumption reduce 10-15% under small and medium-sized load.

由于完全取消了节气门对进气的节流作用，这种无节气门汽油机将大幅度地降低泵气损失，使中小负荷时的燃油耗降低10-15%。

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The pumping station roared into action.

抽水站隆隆口向着开始工作了.

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The rapid pumping action of the tool hurls the abrasive particles at the workpiece at high velocity, thus grinding the workpiece to the shape of the tool.

刀具的快速泵射带动磨粒高速喷向工件，从而把工件磨削成为刀具的形状。

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Healthy valves open and close coordination with the pumping action of your heart's atria and ventricles.

健康瓣膜的开合会严密配合心房与心室的泵血动作.

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