Yob tawm cantilever khib cia qhov system yog anther tshwj xeeb ntawm cantilever khib.Nws yog tib yam nrog cov cantilever khib uas yog ib lub tswv yim daws rau khaws cov ntaub ntawv ntev, xws li cov kav dej yas, cov kav hlau, cov hlau puag ncig, cov ntaub ntawv ntoo ntev.Lub caj npab tuaj yeem txuas ntxiv los ntawm tig lub crank, uas ua rau nws yooj yim dua rau kev thauj khoom thiab tshem tawm cov ntaub ntawv.