fresh water sand 中文意思是什麼
fresh water sand
解釋
淡水砂-
The article analyzes the important problems existing in the well completion technologies for drinking - water suppling in salt - water area on the lower shiyanghe river basin, which reduces sand content of well water and avoids mixing the upper salt water and the lower fresh water
摘要文章分析了石羊河下游鹹水區人飲水成井中存在降低井水含砂量,避免上部鹹水與下部淡水相串兩個關鍵性技術問題。 -
Digging into the sand, they sought for fresh - water springs to irrigate the saplings
他們在沙里挖下去,想找到清水來澆樹苗。
分享友人