人孔井 meaning in English

manhole chimney

Concrete manholes and inspection chambers , unreinforced , steel fibre and reinforced
无钢筋和带钢筋的混凝土人孔井和检验室
Concrete pipes and ancillary concrete products - specification for unreinforced and reinforced concrete manholes and soakaways complementary to bs en 1917 : 2002
预制混凝土管管配件和辅助制品.未加筋和加筋混凝土人孔井及渗水坑规范对bs1917 : 2002规范的补充