英语词汇“contact bed”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	contact bed
释义	contact bed noun : a watertight bed filled with coke or other coarse material and used for purifying sewage which after being run into the bed and left for some hours in contact with the material to promote bacterial action is filtered off and the bed aerated
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英语词典包含332784条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。