other grades of water 中文意思是什麼
other grades of water
解釋
其他等級水-
Certain water areas and land - based areas beyond the first - grade protection zones may be delineated as protection zones of other grades
在生活飲用水地表水源一級保護區外,可以劃定一定的水域和陸域為其他等級保護區。
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