You can put a filter on a particular threshold counter.
您可以对特定的阈值计数器设置过滤器。
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。
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