... cement, carbon black,ect black color twill and stain woven method woven-fiberglass filter bag cloth, reserve air dust collector bag ... from polluting and recovering valuable powder. Weave Structure: 1/3 Twill Weave, 1/4 Twill Weave, Satin Weave, Double Stain, Double Twill, ... Double Filling Face, Broken Twill Weave, Double Face ...