I-servo rocker ekrelekrele ingalo yokucofa umbane kunye nomatshini wokugaya onephaneli yokuchukumisa, ukuguquguquka kwezinto ezinamandla.
Umatshini wokucofa woMbane weMeiwha, wamkele eyona nkqubo iphambili yombane ye-servo yobukrelekrele.Isetyenziselwa intsimbi, i-aluminiyam, iplastiki yomthi kunye nokunye ukucofa.