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white powder K67 PVC resin SG-5 for decorative materials, hard tube
manufacturer market price suspension grade 100% virgin pvc resin sg5 k65 k66 k67 for pipe
raw material white powder polyvinyl chloride PVC resin SG5 K value 67 for PVC Pipe
Factory price PVC Resin SG5 pipe S-1000 S-700 Pipe grade with High Quality
china hs code 3904109001 white powder pvc resin sg5 k 65 67 68 for pipe
cas no 9002862 white powder pvc resin k66 k67 k68 sg5 price from China for PVC pipe