Taw qhia: Nkag siab txog kev ua lag luam oxide o ●●) ua lub luag haujlwm tseem ceeb hauv kev lag luam tawm tsam ntau yam kev lag luam vim nws cov khoom muaj. Pom tau rau nws reddish hue, no compound yog siv hauv kev tiv thaiv
Muaj kev sib raug zoo ntawm kev ua haujlwm siab, kev sib raug zoo thiab kev ua kom zoo nkauj tau peb lub hom phiaj.YOur Company Style hauv kev lag luam nrog pab neeg tshaj lij thiab txhim khu kev qha. Lawv tau xa ib qho kev ua tau zoo thiab tau ntsib peb txhua qhov kev cia siab.