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英文名称:Thermoplastics piping systems—Preliminary evaluation of the resistance to chemicals—Part 3: Unplasticized poly(vinyl chloride) (PVC-U), high-impact poly(vinylchloride) (PVC-HI) , modified poly(vinylchloride) (PVC-M), oriented poly(vinylchloride) (PVC-O) and chlorinated poly(vinyl chloride) (PVC-C) piping components
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