Dab tsi yog Ib Tug

Ncej yog ib yam khoom cylindrical uas hnav nyob rau hauv nruab nrab ntawm cov bearings los yog nyob rau hauv nruab nrab ntawm lub log los yog nyob rau hauv nruab nrab ntawm lub iav, tab sis kuj muaj ib tug me me ntawm nws. Lub axis yog ib qho khoom siv ntawm cov khoom txhawb nqa ntawm kev sib hloov thiab ncav cuag lawv kom xa cov lus tsa suab, torque lossis khoov lub sijhawm. Feem ntau, hlau puag ncig rods tuaj yeem muaj qhov sib txawv ntawm txhua ntu. Qhov chaw ntawm kev sib hloov cov lus tsa suab hauv lub tshuab yog ntsia rau ntawm axis.