standard:101521 | sdo:name | Normsubcommissie 349 165 09 "Betonnen buizen en putten" | |
standard:101521 | sdo:name | Buizen en hulpstukken van onge ...... n (hierin is verwerkt AC:2003) @nl | |
standard:101521 | sdo:name | Concrete pipes and fittings, unreinforced, steel fibre and reinforced @en |