The hydrolytic acidification - oxygen filling film filter pond is used in a sewage treatment plant.
某污水处理厂采用了水解酸化—充氧膜滤池工艺。
An experiment in field and artificial penetration-filter pond test both were conducted to show factors affecting content of nitrate-nitrogen in soil in the present study.
采用田间试验及人工渗滤池试验方法，研究了土壤中硝态氮含量的影响因素。
While not strictly necessary, your pond can benefit from having a pump and biological filter to keep water cleaner.
虽然不是绝对必要，你可以受益于池塘有一个泵和生物过滤水保持清洁。
The simple filter apparatus couldeffectivelly purfty water quality, and raise rearing density and survival rate of the parentshrimp in the overwintering pond.
简易过滤装置可有效地净化亲虾池水质，提高亲虾养殖密度与成活率。
The simple filter apparatus couldeffectivelly purfty water quality, and raise rearing density and survival rate of the parentshrimp in the overwintering pond.
简易过滤装置可有效地净化亲虾池水质，提高亲虾养殖密度与成活率。
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