| 单词 | drain-well | 
| 释义 | > as lemmasdrain-well   drain-well  n. see quot. ΚΠ 1874    E. H. Knight Pract. Dict. Mech.  				Drain-well, a pit sunk through an impervious stratum of earth to reach a pervious stratum and form a means of drainage for surface water. < as lemmas | 
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