Their initial calculations and scale-model wind-tunnel experiments convinced them they wouldn't need a strong wind to lift the 33.5-tonne column.

他们最初的计算和风洞比例模型实验使他们确信，不需要强风就能提起33.5吨的柱子。

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The gas-lift pumping plant is the power source, the gas volume has a direct effect on the scale of gas lift and the selection of power motor will directly affect the cost of gas-lift system.

压缩机组作为气举采油的动力源，其气量直接影响气举采油的规模，而动力机的选择也将直接影响整个气举系统的经济效益；

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They are significant for designing and scale-up of the air-lift reactor, and for researching and development the new reactors.

对指导工厂生产扩产、生产工艺的优化和新型环流反应器的开发等具有积极的意义。

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While ArcelorMittal definitely holds the advantage in economies of scale, we do believe that U.S. Steel has an opportunity to steadily lift its profit margins over the coming years.

FORBES: U.S. Steel Can Get Above $60 With Fatter Profit Margins