The performance curves directly reflect the running status of reciprocating pump and its features; the traditional drawing method has the characteristics, a great deal of work and low efficiency.

性能曲线可直观地反映往复泵运行工况及其特性，传统的绘制方法工作量大，且效率低。

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The parts of 3D vane pump based on automatic generation of process drawing under CAD/CAPP integrated environment is introduced.

介绍了一种以CAD/CAPP集成环境下基于三维叶片泵类零件模型的工序图自动生成技术。

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We have a pump for drawing water from the well.

我们用一个水泵从井里抽水。

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In a neighbourhood just north of the Union Carbide plant, we found people drawing groundwater from a pump.

BBC: Bhopal survivors fight for justice

Instead, he battled to save his newly sown crop by drawing out groundwater with the help of a diesel-powered pump.

WSJ: India's Wilting Crops Tarnish Gold