“slow sand filter”的概念、定义、翻译、参考文献-科学参考

单词	slow sand filter
释义	slow sand filter [`slō `sand ´fil·tǝr] ^{CIVIL ENGINEERING} A bed of fine sand 20-48 inches (151-122 centimeters) deep through which water, being made suitable for human consumption and other purposes, is passed at a fairly low rate, 2,500,000 to 10,000,000 gallons per acre (23,000 to 94,000 cubic meters per hectare); an underdrain system of graded gravel and perforated pipes carries the water from the filters to the point of discharge.
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