英语词汇filter bed怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	filter bed
释义	filter bedn.（名词） A layer of sand or gravel on the bottom of a reservoir or tank, used to filter water or sewage.滤垫：在蓄水池或大容器底部铺的一层沙或砾石，用于过滤水或污水
随便看	syllabling syllabub syllabubs syllabus syllabuses syllepses syllepsis syllogism syllogisms syllogist syllogistic syllogistics syllogists syllogize syllogized syllogizes syllogizing sylph sylphid sylphids sylphs sylva sylvan sylvan Sylvania

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