英语词汇“under-drain”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	under-drain
释义	ˈunder-drain, n. [under-¹ 5 c.] An underground drain. 1805R. W. Dickson Pract. Agric. I. 151 Where under⁓drains are formed for taking off the water below the footways.1868Rep. U.S. Commissioner Agric. (1869) 354 The longitudinal underdrains are to be made of broken stones, and are to be filled up to the level of the surface.
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