KS M ISO 22391-3-2020 Plastics piping systems for hot and cold water installations — Polyethylene of raised temperature resistance(PE-RT) — Part 3: Fittings
2020KS M ISO 22391-3:2020 Plastics piping systems for hot and cold water installations — Polyethylene of raised temperature resistance(PE-RT) — Part 3: Fittings
2010KS M ISO 22391-3:2010 Plastics piping systems for hot and cold water installationsㅡPolyethylene of raised temperature resistance(PE-RT)-Part 3:Fittings