Yog tias koj ua haujlwm nrog cov tshuab hydraulic, koj paub tias nws yog qhov tseem ceeb heev nws yog ua kom ntseeg tau tias koj cov fose fittings tau raug ua txhaum cai. Kev ua txhaum qias neeg tuaj yeem ua rau xau, txo qis kev ua tau zoo, thiab txawm tias lub cev tsis ua haujlwm. Yog vim li cas thiaj nkag siab qhov tseem ceeb ntawm kev ua txhaum kom tsim nyog yog qhov tseem ceeb. Hauv tsab xov xwm no, peb yuav
Tom tsev