Lirolara tsa mofuta oa joke tse beang tsela ea ho bea li-roller tsa mofuta oa joke ke li-roller tsa nale kapa tsa cylindrical tse loketseng ho lekana tsa moralo o le mong kapa o habeli. Lirolara tsa mofuta oa joke tse beang tsela ea ho bea li-unit tse felletseng tse nang le lesale la kantle, kopano ea nale le sehokelo kapa sete e felletseng ea nale kapa cylindrical, e nang le lesale la kahare kapa le se nang lona. Lirolara tsa mofuta oa joke tse beang tsela ea ho bea li-roller li fumaneha ka lesale la kahare kapa le se nang lona. Li hlahisoa ka tataiso ea axial ea lesale la kantle kapa le se nang lona.
