单词 | well drain |
释义 | > as lemmaswell drain well drain n. (a) Agriculture a well sunk to drain wet land, the water being either pumped away or allowed to sink down into porous subsoil; (b) a drain for a compartment or container designed to hold or catch liquid.The use of wells in land drainage is generally attributed to J. Elkington 1763 ( J. Johnstone Account of the Most Approved Mode of draining Land; according to the System practised by Mr. Joseph Elkington (1797) 6). ΘΚΠ the world > food and drink > farming > cultivation or tillage > preparation of land or soil > ditching or drainage > [noun] > other types of drainage > specific type pipe drain1766 air drainage1816 well drain1818 sheep drain1844 pipe drainage1851 dead well1859 mole ditch1860 dumb well1878 1818 A. Rees Cycl. (1819) XXXVIII Well-drain, in Agriculture, that sort of vent or discharge for the wetness of land, which is constructed in somewhat the well or pit manner. 1857 Amer. Agriculturist Oct. 222/1 Generally these well-drains may be made very small and at a trifling expense, and often a whole field may be drained by sinking these wells in the center of local wet spots. 1915 Proc. State Drainage Convent. (Iowa State Drainage Assoc.) 34 The efficiency of the well drain will then depend on the amount of space through which water will flow along the side. 1976 Boating Jan. 73/2 Boat Test No. 242... Outboard well drains with plugs. 1987 U.S. Dept. Agric. Misc. Publ. No. 1455. 83/1 Pumped well drains can be used effectively as relief drains if an aquifer of deep sand and gravel underlies the area. 1993 U.S. Patent 5,245,713 1/1 The unit has a well drain for draining wash and rinse water from the well into the hollow shell. < as lemmas |
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