The paper approaches to the existing problem and cause of the drainage system in Zengchen City.
探讨了增城市排水系统存在的问题及原因。
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, the reasons were analysed, measures were adopted for prolonging operation period of pall membrane filter.
对使用中出现的问题,浅析原因,采取措施,延长了颇尔膜过滤器运行周期。
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