Kuyini Ukusetshenziswa Kwesitifiketi Sokuqhuma-Ubufakazi

Izinto zikagesi ezikhethelwe ukusetshenziswa ezindaweni ezineziqhumane - okuhlanganisa imikhakha efana nowoyela, amakhemikhali, ezemithi, okusanhlamvu, ezempi, kanye nezasolwandle - kuyadingeka ukuze uthole isitifiketi sokuvikela ukuqhuma.