Imodeli ye-GB 4-tandem (2/6-tandem) yensimbi engagqwali elawulwa izinga lokushisa elawulwa izigubhu ezinezigubhu ezine, ezimbili noma eziyisithupha ezincane zensimbi engagqwali, eziwuhlobo olufanayo ukuze kwenziwe izivivinyo ezine, ezimbili noma eziyisithupha. isikhathi, ngaleyo ndlela kuzuzwe umphumela ongcono kakhulu. Ifakwe i-interlayer ye-interlayer kanye nesistimu yokulawula izinga lokushisa, izinga lokushisa lingalawulwa ngokuthanda kwakho ukuze kuhlangatshezwane nemfuneko yokucubungula.Imishini inemisebenzi yesikhathi yokulawula ingqikithi yesikhathi somjikelezo wokusebenza, ubude besikhathi sokujikeleza phambili nokuhlehla. Isivinini sesigubhu singalawulwa ngokusekelwe esimisweni senqubo. Iwindi lokubuka lenziwe ngengilazi eqinile ecace ngokugcwele ukuze izimo zokusebenza zesikhumba esisegqomeni zicace lapho uthi nhlá. Noma isiphi isigubhu singamiswa ngokuthanda kwakhe ngesikhathi sokusebenza kwesigubhu. izigubhu ngokusebenzisa uhlelo lwe-clutch.Amanzi noma isikhumba singafakwa ezigubhini ngesikhathi izigubhu zisebenza ngohlelo lokulayisha.Imishini ifaneleka ngokukhethekile ukuhlolwa kokuqhathanisa kwezikhumba ezihlukahlukene ngenqwaba encane kanye nezinhlobonhlobo zokwenza isikhumba.
Ithuluzi elibalulekile elisetshenziswa kabanzi kuma-tanneries, izigubhu zokhuni ezinezigxobo eziphakanyisiwe ezakhelwe ngaphakathi noma amabhodi esikhumba.Isikhumba singacutshungulwa kanyekanye ngamaqoqo ngaphakathi kwesigubhu.Uma iqhutshwa igiya ukuze ijikeleze, isikhumba esisegqomeni sibhekene nokugoba okuqhubekayo, ukwelula, ukugubha, ukugubha kanye nezinye izenzo zemishini, okusheshisa inqubo yokusabela kwamakhemikhali futhi kuguqule izakhiwo ezibonakalayo zesikhumba.Uhla lokusetshenziswa kwesigubhu luhlanganisa izinqubo eziningi zokucubungula ezimanzi zokushukwa, kanye nokuthamba okomile nokuphaphatheka, njll.
