1. Cov khoom xaiv:
Xaiv cov khoom haum rau lub raj mis ntawv, xws li tus tsiaj, pvc, lossis hluavtaws daim ntawv, kom paub meej tias detability thiab dej tsis kam.
Xav txog qhov cim npe pob tshab thiab xim, thiab xaiv cov number case tsim nyog kom ntseeg tau meej thiab sib txawv ntawm cov qauv.
2. Luam tawm Chaw:
Nco ntsoov tias cov khoom luam tawm yog huv thiab ua haujlwm kom raug, thiab ua kev kuaj xyuas thiab txij nkawm ib txwm muaj thiab tu ib txwm.
Kho cov tshuab luam tawm, xws li kub, nrawm, thiab siab, kom ntseeg tau cov txiaj ntsig luam ntawv zoo.
3. Cov qauv tsim:
Zam kev tsim qauv zoo tshaj plaws thiab kom meej meej ntawm cov ntawv nyeem thiab kab.
Yog tias luam ntawv dawb lossis lwm lub teeb xim ntawm pob tshab, cov kab hauv qab dawb huv yuav siv los txhim kho xim xim.
4. Ib puag ncig tswj:
Tswj qhov kub thiab cov av noo ntawm kev luam ntawv ib puag ncig kom tsis txhob muaj cov av noo ntau uas tuaj yeem ua rau thaj chaw noo rau daim ntawv.
Zam kev tshav ntuj ncaj qha los tiv thaiv UV Rays los ntawm kev ceev cov laus ntawm cov cua sov {}}}} rhiab txheej.
5. Kev Tiv Thaiv thiab Kev Tiv Thaiv:
Tom qab siv txhua qhov siv, rov ua cov ntawv sau ntxiv kom tswj lawv cov khoom siv kom raug. Zam kev ua cov ntawv sau rau cov ntawv sau tseg rau ib puag ncig ntev, xws li qhov kub thiab txias, thiab lwm yam.
