Muaj ob txoj haujlwm yooj yim ntawm cov khoom ntom ntawv pov thawj cov ntaub ntawv pov thawj, ib lub cuab yeej ua haujlwm, ib qho yog los tiv thaiv txoj haujlwm.
Kev Ua Hauj Lwm Hauv Tsev Ua kom haum cov peev txheej, qhov hnyav thiab ntau pes tsawg ntawm txhua pob, uas yog yuav tsum tau muab xam thiab txhais raws li ib qho tseem ceeb ntawm kev ua haujlwm lossis hom kev ua haujlwm ntawm txhua yam khoom. Xws li dej haus, raws li ib tug neeg haus tau cov txuj ci tsim los tsim qhov loj ntawm lub khob. Cov ntawv pov thawj txhuas cov ntawv pov thawj cov ntawv pov thawj yuav tsum yog raws li kev tiv thaiv ntsuab raws li lub hauv paus theem pib, yuav tsum yog lub luag hauj lwm rau tib neeg kev noj qab haus huv thiab kev tiv thaiv kev nyob ib puag ncig.
Kev tiv thaiv ua haujlwm Kev tiv thaiv yog ib qho ntawm theem pib ntawm cov txheej txheem ntawm cov roj pleev cov ntawv pov thawj, tab sis tseem yog lub hauv paus tseem ceeb ntawm cov roj noo noo aluminium ntawv pov tseg. Kev tiv thaiv ntawm cov ntawv pov thawj txhuas cov ntawv pov thawj, cov tshuab pov thawj cov tshuab ua haujlwm qhia tias cov khoom siv roj ntom ntawv pov tseg thaiv kom tiv thaiv tau cov khoom ntawm lub ntim tsis yog sab nraum kev puas tsuaj, khaws cov khoom ntim tsis raug hloov, tsis muaj kev puas tsuaj, tsis muaj deterioration. Rwb thaiv tsev, txias cia, cia txhais tau tias kom muaj lub sij hawm tsim nyog, yog qhov ua haujlwm ntawm ib qho kev qhia tawm.
