sand filter layer 中文意思是什麼
sand filter layer
解釋
砂濾層-
By sampling in different filter layer and analyse of water head damage in all sampling point, i draw a condusion about filter function of porcelain sand filter is superior to the general filters
通過濾層分層取樣,對各取樣點的水頭損失的分析,得出瓷砂濾料較一般濾料過濾性能優越的結論。
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