... ,2-4mm,3-8mm,4-8mmRaw vermiculite:Golden:0.3-1mm,1-2mm,1.5-2.5mm,1-3mm,2-4mm,3-8mm,4-8mmSilver:0.3-1mm,1-2mm,2 ... system is established. We aim to achieve zero percent defects in the products. This system is executed by a team of ... the quality as the life. We introduced the advanced technology for development. Quality assurance extends from the beginning of raw material ...