Process and apparatus for accurately controlling the rate of introduction and {HEAD ~ the content} of {TAIL ~ alumina} in an igneous electrolysis tank in the production of aluminium 
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Process and apparatus for accurately controlling the rate of introduction and { HEAD ~ the content } of { TAIL ~ alumina } in an igneous electrolysis tank in the production of aluminium
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH