Parizvino, pane zvikamu zvakawanda zvakakosha zvekugadzirisa zvakare tungsten carbide.Imwe ndiyo inonzi nzira yekurapa yepamusoro-yepamusoro, iyo inosanganisira: saltpeter melting method, air oxidation sintering method, oxygen calcination method, nezvimwewo;imwe yacho inyanzvi yekupwanya nzira, iyo ...
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