Cov kabmob pob ob kab yog tsim rau cov khoom thauj radial nruab nrab thiab cov khoom thauj axial me me hauv ob qho kev taw qhia. Lawv tus qauv tsim thiab kev ua haujlwm zoo ib yam li ob lub pob ib kab. Cov kabmob no yog siv rau hauv cov ntawv thov uas lub peev xwm thauj khoom ntawm cov kabmob ib kab tsis txaus. Cov kabmob pob ob kab muaj tib lub cheeb sab nraud thiab lub qhov taub zoo li cov kabmob ib kab, tab sis dav dua thiab muaj peev xwm thauj khoom ntau dua li cov kabmob ib kab ntawm 62 thiab 63 series.
