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The polytropic efficiency is one of the most significant indicators.
多变效率是最重要的指标之一。
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The polytropic efficiency is one of the most significant indicators which are used to judge the economical efficiency of the units.
离心式压缩机组广泛应用于石油天然气工业领域，而多变效率是衡量该系统运行经济性的重要指标之一。
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