Semect 21, webosaete ea nts'etsopele ea naha le lits'ebeletso tsa liphetoho tsa Refet
Lihlahisoa tsa bohlokoa le lits'ebeletso tsa indasteri ea rabara li kenyelelitsoe ka thakhisa ea tataiso li ka etsahala ka tsela e latelang:
Rabara ea boleng bo holimo ea synthetic
Lintho tse phahameng tse sebetsang
Li-biomaterials
Ho nchafatsa likarolo tsa auto le lihlahisoa tsa motlakase le tsa motlakase
Lisebelisoa tsa ho nchafatsa
Litšebeletso tsa ho nchafatsa lisebelisoa
Raber e phahameng ea boleng bo holimo e kenyelletsa: Rabera ka mesebetsi ea mocheso, thepa e ncha ea rabara, friebber
Ha moetsi oa litheko oa rabara, letsatsi le tla bua ka lihlahisoa tsena tse ncha ebe u phahamisa mohala oa rona oa khoebo {{0 0}]