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Underdrain

資料來源 : pyDict

地下排水管; 暗渠

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Underdrain \Un"der*drain`\, n.
   An underground drain or trench with openings through which
   the water may percolate from the soil or ground above.

Underdrain \Un`der*drain"\, v. t.
   To drain by forming an underdrain or underdrains in; as, to
   underdrain land.
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