南水北调中线渠首分局举办通水三周年“开放日”活动

 
Comment(s)打印 E-mail 中国网 2017-12-15
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 12月14日,在陶岔水质自动监测站,工作人员正在监视器前对水质进行监测。[中国网 程功 摄]


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