BS EN 1124-4:2005
污水系统用带套管和孔座的纵向焊接不锈钢管和配件.第4部分:真空排水系统和船用排水系统的部件
Pipes and fittings of longitudinally welded stainless steel pipes with spigot and socket for waste water systems — Part 4: Components for vacuum drainage systems and for drainage systems on ships