According to the existing problem of salt mining process, the salt mining system was innovated partly.
针对采盐工艺出现的问题对采盐工序进行了局部改造。
According to the existing problem in production of stripping, the double-tower and parallel connection process and its characteristics, and optimization of operation control were discussed.
针对传统汽提生产流程存在的问题，论述了双塔并联工艺及其特点和操作控制的优化过程。
According to the existing problem in vinyl chloride production process, the differences between domestic and abroad were analysed. The basic status of advanced process from abroad was also introduced.
针对国内氯乙烯生产工艺存在的主要问题，分析了与国外先进工艺的主要差距，介绍了引进的国外先进工艺的基本情况。
According to the existing problem in vinyl chloride production process, the differences between domestic and abroad were analysed. The basic status of advanced process from abroad was also introduced.
针对国内氯乙烯生产工艺存在的主要问题，分析了与国外先进工艺的主要差距，介绍了引进的国外先进工艺的基本情况。
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