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井水为什么用不完
更新时间: 2020-11-16 00:00:00  

井水不一定用不完,那因你只看到你身边的那些还连着地下水的井,现的很多老井全枯了,还想利用时可只有加深了连上现的地下水层才可有水了。水算再生资源。可如是用人为的方法再生时成本可高了,所以也要节约用水。

关键词: 井水 为什么

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