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PVC: POLYVINYL CHLORIDE : ABOVE GROUND USING.
UPVC: UNPLASTICIZED PVC : UNDERGROUND USING.
CPVC: CHLORINATED POLYVINYL CHLORIDE : THERMO PLASTIC : HWS PURPOSE
when you want to different among three types of pvc ,we must know this expressions
** pvc is poly vinyl chloride
**** upvc unplasticized poly vinyl chloride
**** cpvc chlorinated poly vinyl chloride