Ee, e joalo ka mekhoa e tloaelehileng ea ho hlapela e tloaelehileng, e hlokahala ka lebaka la laser .}
Mehla e bolokehileng le e sebetsang e ka phethoa ka ho roala helmete e sa tsebeng letho ka boemo ba moriti bo loketseng mofuta oa laser o patehile ho {{0 0 0}}
Ha u sebelisa lipalesa, polokeho e lokela ho lula e le pele, 'me u apere lisebelisoa tse sireletsang tse loketseng tseo u li sebelisitseng hantle le tse khotsofatsang {{0 1}