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Shijiazhuang Yuncang Water Technology Corporation Limited ndi amodzi mwa magulu otsogola ku China, omwe ndi apadera pakupanga ndi kupereka mankhwala amadzimadzi ndi mankhwala ena ochizira madzi kwa zaka zopitilira 12. Ndi zaka zoposa 27 mu mzere wa madzi mankhwala malonda mayiko, ndi zaka 15 kumunda kusunga zinachitikira dziwe kusambira ndi mafakitale mankhwala madzi, ife odzipereka kupereka okwana mzere madzi mankhwala ndi njira luso kubwerera.