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           ball mill


1) ‹Mecânica›  fresa de ponta esférica


  A ball mill, a type of grinder, is a cylindrical device used in grinding (or mixing) materials like ores, chemicals, ceramic raw materials and paints. Ball mills rotate around a horizontal axis, partially filled with the material to be ground plus the grinding medium. (http://en.wikipedia.org...)

  exemplo
"The iron ore and the auxiliary raw materials may be ground with a ball mill" = "O minério de ferro e as matérias-primas auxiliares podem ser moídos com uma fresa de ponta esférica"






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