1. Thepa ea Mechani: Sena se kenyeletsa tlhahisoleseling mabapi le matla a anyebe, ho thata, ho fokotsoa le ho ba thata le ho ba thata. E kanna ea kenyelletsa litekanyetso tse kang matla a phethehileng, a qosa, matla le ho hanyetsa ha ho na le tšusumetso. Melemo ea 2. Thekollo ea 2. Sena se kenyelletsa tlhahisoleseling mabapi le pherekano e khathollang ea alloy ea alloy, e lekaneng ea kemiso ea apaliseng, le ntlha e qhibilihang. Mefuta ena e bohlokoa bakeng sa lits'ebetso moo ho fetisang mocheso kapa ho ameha ka liphetoho. 3Frication Properties: Sena se kenyelletsa tlhahisoleseling mabapi le ho leka-lekaneng ha ayy, ho na le motho ea nang le mali. E bontša kamoo ho anyesang ho ka bopehileng habonolo, ho kopantsoe, kapa ho sebetsoa nakong ea tlhahiso.