soil pipe
 汙水管


 Soil, n.
 1. The upper stratum of the earth; the mold, or that compound substance which furnishes nutriment to plants, or which is particularly adapted to support and nourish them.
 2. Land; country.
 Must I thus leave thee, Paradise? thus leave
 Thee, native soil?   --Milton.
 3. Dung; faeces; compost; manure; as, night soil.
    Improve land by dung and other sort of soils.   --Mortimer.
 Soil pipe, a pipe or drain for carrying off night soil.


 Soil pipe. A pipe or drain for carrying off night soil.

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 soil pipe
      n : drain that conveys liquid waste from toilets, etc.