1) 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...)|
|"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"|