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additives; dry building materials; feed additives; fine mineral; nanomaterials. 2: The paper bag is a composite formed by the inverse of plastic and kraft paper, usually plastic layer is made of polypropylene (pp) or polyethylene (pe) as the substrate flat yarn woven, kraft paper is used refining complex dedicated kraft paper, with a strength high, waterproof, beautiful appearance features. Is one of the most popular packaging materials, plastic materials widely used in the quilt, cement, feed, chemicals, fertilizer and other industries. 0 && image.height> 0) {if (image.width> = 700) {this.width = 700; this.height = image.height * 700 / image.width;}} "id
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