Emhlabeni wanamuhla othuthuke kakhulu kwezobuchwepheshe, idizayini yokusetshenziswa kubonwa idlala indima ebalulekile ekuthuthukiseni ulwazi lwabasebenzisi bemishini ehlukahlukene namathuluzi.Isixazululo esisodwa esiye sathola ukuthandwa okukhulu ukushintshwa kolwelwesi lwe-PCB.Lesi sihloko sihlola ubunkimbinkimbi bokushintshwa kolwelwesi lwe-PCB, izingxenye zabo, isimiso sokusebenza, izinzuzo, izinhlelo zokusebenza, ukucatshangelwa kwedizayini, inqubo yokukhiqiza, ukunakekelwa, kanye nezitayela zesikhathi esizayo.