1. Litlhoko tsa ts'ebetso ea thepa ea likarolo tsa likarolo tsa koloi.
Likarolo tse ngata tsa likarolo tsa koloi li sebelisa mokhoa oa ho etsa roll, o nang le litlhoko tse itseng bakeng sa sebopeho sa thepa, ho tiea, ho hanyetsa kutu le ho cheseha.Ka kakaretso, ho sebelisoa lipoleiti tsa tšepe tse matla haholo le litšepe tsa lijo-thollo tse ntle haholo tse nang le matla a 300-600MPa.
2. Litlhoko tsa ts'ebetso ea thepa ea likarolo tsa likoloi tsa likoloi.
Likarolo tsa koloi ea koloi ha li hatellehe, 'me mokhoa oa ho etsa hlobo oa amoheloa,' me thepa e hlokahala hore e be le sebopeho, ho tiea ha tsitsipano, ho atolosa, ho hanyetsa dent, ho hanyetsa kutu le ho chesoa.Moqapi oa lihlahisoa, lishiti tsa tšepe tse pota-potiloeng ka carbon tse batang, lishiti tsa tšepe tse batang tse tlase-tlase tse batang, lishiti tse pota-potiloeng tse peli tse batang tse nang le thepa e phahameng ea ho tsitlella, lishiti tse pota-potiloeng ka mokhoa o batang tse matla haholo, serame se khanyang haholo. -matlapa a roliloeng, 'me a behile lishiti tse koetsoeng ka serame, litšepe tsa ultra-low carbon, matla a phahameng a batang a batang, matla a holimo a nang le phosphorus a nang le matla a holimo a batang, le mefuta e meng ea litšepe tse kang tse koahetsoeng. lishiti tsa tšepe, lishiti tsa tšepe tse entsoeng ka seroki le lishiti tsa tšepe tsa TRIP.