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Ebee ka a na-ekesa flake graphite eke?
Dịka akụkọ nke The United States Geological Survey (2014) si kwuo, ihe nchekwa flake graphite eke a nwapụtara n'ụwa dị nde tọn 130, nke gụnyere tọn nde 58 nke Brazil, nke China dịkwa nde tọn 55, nke bụ ọkwa kachasị elu n'ụwa. Taa, anyị ga-agwa gị...GỤKWUO