英语词汇“filter bed”是什么意思，“filter bed”的读音、用法及例句翻译-烛光网

词汇	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	straight man straight off straight-out straight poker straight razor straights straight shooter straight ticket straightway straight–ahead straight–arm straight–back straight–backed straight–from–the–shoulder straight–laced straight–line straight–out strain strained strained strainer strainers strain gauge straining straining beam

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