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3 definitions found
From: DICT.TW English-Chinese Dictionary 英漢字典
 underdrain
 地下排水管; 暗渠
From: Webster's Revised Unabridged Dictionary (1913)
 Un·der·drain n. An underground drain or trench with openings through which the water may percolate from the soil or ground above.
From: Webster's Revised Unabridged Dictionary (1913)
 Un·der·drain v. t. To drain by forming an underdrain or underdrains in; as, to underdrain land.