Npog Tsab Ntawv Xuv Nthuav Qhia

Npog daim kab xev yog ib daig ntawm daim nplaum nplaum ua cov ntaub ntawv thiab lub siab tawv ua kua, coated nrog cov tawv ncauj tawm ntawm daim ntawv nplaum, thiab coated nrog cov khoom tawm ntawm sab hauv. Nrog rau kev kub taub hau, kev ua hauj lwm zoo, ua kom siab, muag muag thiab rov tear tsis tau tawm hauv cov khoom seem. Kev lag luam yog feem ntau hu ua daim npog ntsej muag ntawv siab tawv ua daim nplaum.