深度处理 meaning in English

advanced treatment
afterpurification
polishing process

Hospital wastewater treated by iron chipping micro - electrolysis
铁屑微电解法深度处理医院废水
Research on the technique of coking wastewater advanced treatment
焦化废水深度处理技术的进展
Study of advanced oil field wastewater treatment using expanded graphite
膨胀石墨深度处理油田废水研究
Study on advanced treatment and reuse technology of municipal sewage
城市污水深度处理及回用技术的研究
Study on treatment methods of middle - stage wastewater in papermaking industry
造纸中段废水深度处理方法探析

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