Bearing yog ib qho tseem ceeb hauv cov cuab yeej siv tshuab niaj hnub no.Nws lub luag haujlwm tseem ceeb yog txhawm rau txhawb nqa lub tshuab tig lub cev, txo cov coefficient ntawm kev sib txhuam thaum nws txav mus los, thiab xyuas kom meej tias nws qhov tseeb.