ISO 21138-2:2020 EN 274cfb3f
Plastics piping systems for non-pressure underground drainage and sewerage — Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) — Part 2: Pipes and fittings with smooth external surface, Type A
现行
发布日期 :
2020-01-20
实施日期 :
ISO 21138-3:2020 EN 38ea90cd
Plastics piping systems for non-pressure underground drainage and sewerage — Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) — Part 3: Pipes and fittings with non-smooth external surface, Type B
现行
发布日期 :
2020-01-20
实施日期 :
ISO 22282-1:2012 EN f077d9cd
Geotechnical investigation and testing — Geohydraulic testing — Part 1: General rules
现行
发布日期 :
2012-06-01
实施日期 :