Pressure switch (optional) is installed in system to realize automatic transfer for pump under low oil pressure.

系统中设有压力开关(可选)，以实现在低限油压时的泵组自动切换。

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There is an oil pressure sensor near the oil pump that monitors pressure and sends this information to a warning light or a gauge on the dashboard.

在油泵附近有个油压力传感器，它能检测油的压力并传递给警示灯或仪表板上的油量表。

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If oil pressure was low and pump is within specifications, inspect for worn engine bearings or other reasons for oil pressure loss.

如果油压低并且泵在规格表内，则针对油压低的问题检查磨损的引擎轴或其它原因。

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It is powered by an engine which drives a hydraulic pump to send oil under high pressure around its plumbing in order to animate its limbs.

BBC: BigDog four-legged robot now sports throwing arm

General scepticism about OPEC's ability to pump any more oil has also put upward pressure on the price.

ECONOMIST: Pumping all they can? | The