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1. Oxford Dictionary

   outfall pipe

   • n.
     a pipe through which a drain or sewer empties into the sea, a river, or a lake

   • noun: outfall pipe, plural noun: outfall pipes

2. • 釋義

   n.

   名詞

   • 1. a pipe through which a drain or sewer empties into the sea, a river, or a lake a large sewage outfall pipe is to be extended