柯林斯英汉双解大词典
filter bed
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1.
N a layer of sand or gravel in a tank or reservoir through which a liquid is passed so as to purify it 过滤砂砾层 → compare bacteria bed
双语例句
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Backwashing is one of the methods to maintain a filter bed clean.
反冲洗是保持滤床清洁的方法之一。
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Experiments showed decreased porosity of the filter bed along the filtering direction.
试验发现，短纤维束滤料滤层的孔隙率沿过滤方向由大到小，为变孔隙滤层。
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Regenerate the softener before you use it. Use clean, chlorinated water to backwash the filter bed.
在使用前需要清洁软水器。使用干净的、氯化消毒水反复清洗过滤床。
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