Hom Lub Npe: NANBEI
Qauv: BK-FL
Muaj feem xyuam rau cov chaw soj nstuam tshaj lij, kev tshawb fawb kho mob, kev qhia hauv tsev kawm ntawv, kev tshawb fawb cov ntaub ntawv tshiab thiab kev sim
Cov yam ntxwv ua haujlwm
1. tuaj yeem txhim kho txog li 6 qhov sib txawv ntawm cov lim dej fluorescent, kev siv yooj yim dua
2. Muab ntau yam kev xaiv lim tawm