... and CE certification 2,Best quali Road construction materials short fiber knitting geotextile 1,ISO 9001, ISO14001, ISO18001 and CE ... are easy for blockage, since net structure formed by indefinite fiber has variable and motility. 2,It has high permeation and ... . 3,It has corrosion resistance, uses chemical fiber such as polypropylene or dacron as raw material, has acid and alkali resistance, hasn ...