1) Filter sand barrels
过滤砂桶
2) filter vat
过滤桶
3) filtration with Mn sand
锰砂过滤
4) sand filtration
砂过滤
1.
This paper presents the recycling process of wastewater scouring feather with method of coagulation deposition and sand filtration in Chengmai Feather Factory.
文中介绍了羽绒废水处理回用工艺，对澄迈羽绒厂精洗废水采用混凝沉淀与砂过滤法进行处理。
5) slow sand filtration
慢砂过滤
1.
The principles,processes,costs and(effects) of different disinfection techniques were summarized,especially a new method of slow sand filtration was introduced.
该文综述了国内外营养液消毒方法、原理、成本及应用效果,重点介绍了营养液消毒新技术-慢砂过滤。
6) sand filter
砂过滤器
1.
Experimental study on characteristics of laminated sand filter for micro-irrigation;
微灌用叠片式砂过滤器性能试验研究
2.
Computational simulation of hydraulic characteristics for laminated sand filter;
叠片式砂过滤器水力特性模拟计算(英文)
补充资料：直桶桶
1.直而中空。
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