Kwimeko yokuvelisa kunye nokuchaneka koomatshini, Ukushushu kunye noomatshini bokutshisa i-roller badlala indima ebalulekileyo ekuphuculeni umgangatho ophezulu kunye nokuchaneka kobukhulu bezinto ezahlukeneyo. Ezi matshini zixabiseke ngokukodwa kumashishini afuna ukuchaneka okuphezulu, njengezithuthi, i-aerospace, kunye nobunjineli ngokubanzi. Ukuqonda imisebenzi yabo kunokubonelela ngengqiqo