After the introduction of sanitary water and sewage treatment, the number of cases of cholera quickly diminished.
实行卫生用水与污水处理以后，霍乱病例的数量迅速减少了。
Sanitary sewage up to national Grade 1 emission standard after the treatment of regulation, precipitation and sterilization by CL buried sewage treatment plant.
生活污水经调节、沉淀、消毒处理的CL地埋式生活污水处理成套装置处理后达到国家规定的一级排放标准。
Sanitary sewage up to national Grade 1 emission standard after the treatment of regulation, precipitation and sterilization by CL buried sewage treatment plant.
生活污水经调节、沉淀、消毒处理的CL地埋式生活污水处理成套装置处理后达到国家规定的一级排放标准。
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