01 Nws yog ib qho tseem ceeb kom tsis txhob overtightening, vim qhov no tuaj yeem rub cov ntsia hlau los yog ua rau puas tsuaj rau cov khoom siv nyob ib puag ncig. Tshaj li tsuas yog kho cov qauv kev ncaj ncees ntawm cov tsom iav qhov muag, cov ntsia hlau teeb kuj ua rau lawv txoj kev nplij siab thiab kev ua haujlwm ntev. Los ntawm kev xyuas kom meej tias cov thav ntawv tseem ruaj khov thiab ua kom zoo, cov ntsia hlau teeb yuav pab tiv thaiv kev hnav thiab tsim kua muag ntxiv, ua rau lub neej ntev ntawm cov looj tsom iav. Cov neeg siv cov tsom iav tsis tu ncua, tshwj xeeb tshaj yog cov neeg uas muaj kev ua neej nyob lossis cov uas nquag koom nrog cov kev ua ub no uas ua rau muaj kev cuam tshuam ntxiv rau lawv cov tsom iav, tuaj yeem tau txais txiaj ntsig zoo los ntawm cov cuab yeej siv tau zoo no. Nws yog ib qho tseem ceeb ntawm cov khoom siv kho qhov muag tsom iav, muab lawv txoj hauv kev kom sai thiab zoo daws teeb meem uas yuav tshwm sim nrog lawv cov thav ntawv.