NF P16-321-7:1996 Vitrified clays pipes and fittings and pipe joints for drains and sewers. Part 7 : requirements for vitrified clay pipes and joints for pipe jacking.
1996NF P16-321-7:1996 Vitrified clays pipes and fittings and pipe joints for drains and sewers. Part 7 : requirements for vitrified clay pipes and joints for pipe jacking.