③ Thepa ea ceramic e sebelisoang haholo e thibelang likulo Ho tloha lekholong la bo21 la lilemo, lirafshoa tse thibelang likulo li tsoetse pele ka potlako, 'me ho na le mefuta e mengata, ho kenyelletsa alumina, silicon carbide, boron carbide, silicon nitride, titanium boride, joalo-joalo, tseo har'a tsona lirafshoa tsa alumina (Al₂O₃), silicon carbide cera...
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