Thaum lub pob kabmob pov tseg thiab tshawb xyuas, qhov tsis ua tiav ntawm kev coj tus kheej thiab qhov ua rau muaj kev puas tsuaj tuaj yeem txiav txim siab raws li kev puas tsuaj ntawm cov kabmob.
1. Cov hlau nti rau ntawm txoj kab kev sib tw Cov txheej txheem ntxig ntawm cov kabmob thiab cov chaw sib tw ntawm cov npoo sab hauv thiab sab nraud yog raug rau lub sijhawm hloov kho kom zoo, uas ua rau muaj kev sib hloov mus los ntawm kev sib cav. Thaum tus naj npawb ntawm cov kev ntxhov siab mus txog qee yam muaj nuj nqis, qaug zog heev tshwm sim ntawm thaj chaw ua haujlwm ntawm cov ntxuag khoom lossis cov nplhaib puab thiab sab hauv. Yog hais tias cov kabmob nyhav dhau heev, lub zog no yuav ua rau hnyav dua. Tsis tas li ntawd, cov kabmob tsis tau txhim kho kom zoo, kev ua haujlwm yog khoov, thiab qhov kev sib tw ntawm haiv neeg tev tawm kuj tseem yuav tshwm sim. Qaug zog sab nraub qaum ntawm cov kabmob haiv neeg yuav txo qhov khiav ceev ntawm tus ncej, ua rau lub tshuab ua kom nrov thiab suab nrov.
2. Cov kabmob roj hlawv Lub cev kub ntxhov roj tau muaj cov xim ntawm lawv cov haiv neeg thiab cov khoom sib dhos. Cov laj thawj ntawm hlawv roj yog feem ntau tsis txaus lubrication, qhov zoo ntawm cov roj nplua nyeem tsis tau raws li qhov yuav tsum tau ua lossis tsis ua haujlwm, thiab cov kabmob sib dhos tau nruj dhau.
3. Yas deformation Cov yas tsis txawv txav rau ntawm qhov chaw tiv tauj nruab nrab ntawm qhov chaw sib tw thiab cov menyuam ntawm cov kabmob qhia tias tus kabmob muaj yas deformation. Qhov laj thawj yog tias nyob rau ntawm qhov kev ua los ntawm qhov kev ntsuas zoo li qub lossis cuam tshuam rau lub nra, cov kev ntxhov siab hauv ib cheeb tsam ntawm cov chaw ua haujlwm ntau dua qhov tawm ntawm cov khoom. Cov xwm txheej no feem ntau tshwm sim rau ntawm qis kev sib hloov cov kabmob.
4. Kev nrib pleb ntawm cov kabmob sib tsoo Kev sib tsoo ntawm cov kabmob sib tsoo yuav muaj los ntawm kev sib zog ntau dhau ntawm cov kabmob haum, kev xoob ntawm cov kabmob sab nraud lossis sab hauv lub nplhaib, deformation ntawm cov kabmob muaj cov khoom, thiab kev ua haujlwm tsis zoo ntawm cov kabmob.