ISO 21138-2:2007
Действует
Plastics piping systems for non-pressure underground drainage and sewerage -- Structuredwall Piping systems of unplasticized poly(vinyl сhloride) (PVC-U), polypropylene (PP) and polyethylene (PE) -- Part 2: Pipes and fittings with smooth external surface, Type A
— 48 стр.
