M'dera la Longyan Sewage Treatment Plant ku Nanchuan, Chongqing, zida zowunikira zamadzi za Sinomeasure: mita ya pH, mpweya wosungunuka, mita ya turbidity, mita ya sludge ndi zida zina zagwiritsidwa ntchito bwino panjira yachimbudzi, yomwe ...
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