This system consists of: pump test bed, sensors, signal processing circuit, data-collecting card, computer processing.

该系统由水泵试验台、传感器、信号调理电路、数据采集卡、计算机处理几个部分组成。

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By this method, when the surface dynamometer card is known, the dynagraph at the pump can be accurately determined;

用这种方法，在地面示功图已知时，可以精确地确定井下泵的示功图；

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Most of us have come across gas stations advertising discounts on cash transactions at the pump vs. credit card transactions.

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Customers run their credit card or customer card through the a smart-card holder installed at the pump.

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Wave it near a reader, whether on a gas pump or in the fast-food line, and if you have enough credit on the card it's linked to the payment takes only seconds.

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