A new approach to keeping control of ship heading is presented, which USES a primary filter and a secondary filter.

提出一种采用基本滤波器和辅助滤波器进行船舶航向保持控制的新方法。

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The primary filter for continuous cleaning, and the secondary filter for collection of fine particles. Heat pump can also be offered to increase the total thermal efficiency.

主过滤器进行连续清理，次过滤器收集细小颗粒，同时采用热泵来提升总热效率。

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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。

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