Iirubbers zemikhono ephezulu zizinto ezothusayo ezisetyenziselwa uthotho lweJumbo yoomatshini bezitena. Zisetyenziselwa ukukhusela umkhono ophezulu kunye nokunciphisa ukuguqulelwa kwentshukumo ukusuka kwimigodi yesikhokelo ukuya kwisakhelo somatshini.
 
 Ngelixa into ngokwayo ingafumani mandla ngokurhabaxa, irabha ihlala icinezelwe ngokuqinileyo ukugcina umkhono ophezulu uzinzile ukuze ufumane isikhombisi sokumisa isikhombisi. Ukuphindaphinda okujikelezayo kokumisa ubunzima beyunithi yesitampu kuthetha ukusikwa yonke imihla kunye nokwandiswa okuchaphazela ngokwendalo irabha yemikhono ephezulu kwaye ekugqibeleni kufuna ukutshintshwa.
 
 Zine (4) zisetyenziswa kumatshini wokwenza izitena-Gcina ezinye zezi rubb njengezinto ezinokusetyenziswa endaweni yazo.
 
 Le ayisiyiyo irabha enyukayo esetyenziswe kwitafile yentshukumo.