陶土管道 meaning in Chinese

earthenware conduit

Vitrified clay pipes and fittings and pipe joints for drains and sewers . part 6 : requirements for vitrified clay manholes
排水及污水陶土管道.配件和管接头.第6部分:陶土管道出入水孔要求
Vitrified clays pipes and fittings and pipe joints for drains and sewers . part 7 : requirements for vitrified clay pipes and joints for pipe jacking
排水及污水陶土管道.配件和管接头.第7部分:陶土管道和管道插孔用连接件要求
En 295 - 5 vitrified clay pipes and fittings and pipe joints for drains and sewers . part 5 : requirements for perforated vitrified clay pipes and fittings
排水及污水用陶土管道配件和管接头.第5部分:多孔陶土管道和配件的要求