NF P16-321-5:1994 Vitrified clay pipes and fittings and pipe joints for drains and sewers. Part 5 : requirements for perforated vitrified clay pipes and fittings.
1994NF P16-321-5:1994 Vitrified clay pipes and fittings and pipe joints for drains and sewers. Part 5 : requirements for perforated vitrified clay pipes and fittings.