The Cobra-Jet filter is cleaned by compressed air. It is used for very aggressive types of dust, in order to prevent rapid wear of the filter cloth. As an investment the Cobra-Jet filter, is more expensive than a Pat-Jet, but even after changing the filter cloth apr. 3 times, a bag type filter such as the Cobra-Jet is more economical even taking maintenance costs into consideration.
眼镜蛇式除尘用压缩空气清洗。它是用于非常积极的类型的粉尘，为了防止滤布磨损快。作为一种投资眼镜蛇式除尘，比拍飞机更昂贵，但即使在更换过滤布四月三日倍，袋式过滤器如眼镜蛇喷射是更经济，甚至以维护成本考虑。
