Izintambo eziya ebhodini izixhumi izixhumi zikagesi ezisetshenziswa ukuxhuma izintambo ebhodini lesekethe eliphrintiwe (PCB).Lezi zixhumi zihlanganisa izindlu, abathintwayo, kanye nezindlela zokukhiya ukuze kuvikelwe izintambo endaweni.Avame ukusetshenziswa ezinhlobonhlobo zemishini kagesi kanye nezinhlelo zokusebenza lapho kudingeka ukuxhumana okuthembekile nokuvikelekile phakathi kwezintambo nama-PCB.