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。

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.

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公司主要产品有初效过滤器、中效过滤器、高效过滤器，以及活性碳空气过滤器。

Company's main products are the early effect filter, in effect filter, high efficiency filters and activated carbon air filter.

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检查MAU的初中效过滤器，当压差报警时对初效过滤器进行清洁或更换；

Check MAU filter, clean or replace it when DP alarms.

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