Theory and necessity of all low temperature shift process are described.
阐述全低变工艺改造的理论和必要性。
Theory and necessity of all low temperature shift process are described. Modification content and effect are introduced. Significance of its wide application is pointed out.
阐述全低变工艺改造的理论和必要性。介绍该厂有关改造的内容和效果，指出该工艺具有广泛的推广性。
Application of all low temperature shift process to small size nitrogenous plants in Hunan province is introduced. Specific items need to pay attention to is put forward based on the experience.
介绍了全低变工艺在湖南省小氮肥应用的基本情况，并针对出现的问题提出了在实施全低变工艺中应注意的事项。
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