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应用多元体系由一系列单位体系组成的假设，开发了萃取磷酸Ｐ２Ｏ５含量的计算方法及具有辅助萃取磷酸生产功用的计算机软件‘ＤＰＳ’。它在提高萃取磷酸装置生产能力中有着特别重要的作用。Ｐ２Ｏ５含量预报误差随ＳＯ３含量的分析误差而变。
Based on the assumption that a multiple system consists of a series of unit systems, a method for calculating the P2O5 content of phosphoric acid was developed and a computer software ’DPS’ was developed for the auxiliary extraction of phosphoric acid. It plays a particularly important role in improving the capacity of extraction phosphoric acid plant. The prediction error of P2O5 content changes with the analysis error of SO3 content.