While the primary filter works, some filter cores can be counter rinsed, as a result, the service life of the filter core can be prolonged and the operation cost can be saved.
初滤器过滤杂质的同时，部分滤芯可反冲洗，延长初滤器滤芯的使用寿命，节约运行费用。
The counter- flushing may make the filter bed long- term effective use, reduce the service and the comprehensive cost.
反冲洗可保障滤层长期有效使用，减少维修，降低综合成本。
Methods the amount of bacterium contamination and pathogenic bacteria of the used disinfectant was monitored reverse medium method with closed filter-counter-culture dish.
方法用封闭式薄膜计数培养器反注培养基法对临床使用中的消毒剂染菌量及致病菌进行监测。
The two-filter method is chosen as the experimental method to detect radon concentrations by a FT-648 radon counter.
本文建立了氡浓度测量的双滤膜实验方法，使用FT- 648测氡仪实施氡测量。
The two-filter method is chosen as the experimental method to detect radon concentrations by a FT-648 radon counter.
本文建立了氡浓度测量的双滤膜实验方法，使用FT- 648测氡仪实施氡测量。
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