Combined fill-soft and semi-soft the merits of the two overcome the disadvantages in the chemical and biological sewage treatment process for a better product .It is a plastic ring for the skeleton ,load the vinylon silk ,silk fastening vinylon in the plastic ring ,the sewage in tow evenly distributed , e-health film ,for film ,sewage concentration and adaptability of the good . Widely used in all kinds of sewage and wastewater treatment. | 
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