Tshawb nrhiav cov txiaj ntsig ntawm kev siv cov kabmob tshwj xeeb hauv koj cov tshuab thiab khoom siv. Kawm seb cov bearings bearings tuaj yeem txhim kho kev ua tau zoo, lub sijhawm ruaj khov, thiab ua haujlwm thaum txo cov nqi kho thiab hloov tus nqi.
Nyeem ntxiv