英语词汇“rapid sand filter”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	rapid sand filter
释义	rapid sand filter rapid sand filter [′rap·əd ′sand ‚fil·tər] (civil engineering) A system for purifying water, which is forced through layers of sand and gravel under pressure.
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