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Ebee ka ekesara graphite flake eke?
Dị ka akụkọ nke United States Geological Survey (2014) si kwuo, ihe ndị e gosipụtara na graphite eke sitere n'ụwa bụ nde tọn 130, n'ime ha, ihe nchekwa Brazil dị nde tọn 58, na nke China dị nde tọn 55, na-enye ọkwa kachasị elu n'ụwa. Taa, anyị ga-agwa y ...Gụkwuo