Cov ntawv loj hlau vuam yog cov txheej txheem nyuaj uas yuav tsum tau muaj kev txawj ntse thiab kev tswj xyuas nruj.Ua ntej tshaj plaws, kev npaj ua ntej vuam yog xav tau, suav nrog kev tu, txiav, theem, thiab lwm yam.. Cov kauj ruam no yog los xyuas kom meej qhov zoo thiab ua haujlwm ntawm vuam.
Thaum lub sij hawm vuam txheej txheem, nws yog ib qhov tsim nyog los xaiv txoj kev vuam tsim nyog thiab siv tshuab.Feem ntau hais lus, cov ntawv hlau loj welding yuav tsum tau siv cov khoom siv vuam tshuab thiab cov txheej txheem vuam siv.Cov tswv yim thiab cov txheej txheem no yuav tsum tau muaj kev cob qhia tshwj xeeb thiab kev ua tau zoo los ua kom tau zoo.
Tom qab vuam, yuav tsum tau kuaj xyuas thiab kho kom zoo.Cov haujlwm no suav nrog kev tshuaj xyuas qhov pom, kuaj tsis muaj kev puas tsuaj, thiab kuaj kev ntxhov siab.Tag nrho cov kev soj ntsuam thiab kho cov haujlwm no yog los xyuas kom meej qhov zoo thiab kev nyab xeeb ntawm vuam.
Zuag qhia tag nrho, cov ntawv loj hlau vuam yog cov txheej txheem tseem ceeb heev, uas yuav tsum tau muaj kev cob qhia thiab kev ua tau zoo los ua tus tswv.Nws tseem yuav tsum muaj kev tswj xyuas nruj thiab ntsuas kom ntseeg tau qhov zoo thiab kev nyab xeeb ntawm vuam.Nyob rau hauv lub neej yav tom ntej kev lag luam kev lag luam, nrog kev nce qib thiab kev siv thev naus laus zis, cov ntawv loj hlau vuam yuav tseem ceeb dua thiab siv dav.