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簡述： On the basis of MF-I spec, the square spec pulse dust filter with cloth bag MF- II is the amended and improved one.In addition to the advantages that I spec is high in the dust removing efficiency, big in the air capacity , stable in the performance, easy in operation and maintenance, MC- II has the better result than MC- I. Such as: it is not easy to build up the powder and its application is wide and so on.