Igice cya boiler cyangwa itanura ryinganda aho lisansi ikomeye yabitswe kandi itwikwa neza . Urugereko rukenewe rufite ibice bibiri: kandi icyumba gikenewe gihumeka gishobora guhinduka mu gihome, kugirango umwuka yinjira mu kibaya cya lisansi mu cyuho cyo gutwika . insi yatwitse isezererwa mu manza cyangwa ubwoko bwimukanwa, ubwoko bwo kunyeganyega, ubwoko bworoshye kandi bwanditse .
