输油主泵常要求正的吸入压力，并常由靠近储罐的给油泵(也称喂油泵)提供。
A positive suction pressure on the main pumps usually is needed and is frequently supplied by booster pumps close to the tanks.
绝望中，我给当地的天然气公司总经理查尔斯。沙劳打电话，问他是否能够允让我从他设备堆放场地的油泵里买一箱汽油。
In desperation, I called the President of our local natural-gas company, Charles Scharlau, and asked him if he would let me have a tank of gas from the pump in his equipment yard.
机油泵一个重要的任务是给发动机提供足够量的、压力适当的机油。
The oil pump has the important task of delivering an adequate volume of oil around the engine at a suitable pressure.
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