KS M ISO 3633-2012(2017) Plastics piping systems for soil and waste discharge(low and high temperature) inside buildings-Unplasticized poly(vinyl chloride) (PVC-U)
2012KS M ISO 3633:2012 Plastics piping systems for soil and waste discharge(low and high temperature) inside buildings-Unplasticized poly(vinyl chloride) (PVC-U)