Kev Siv Cov Silicon Hlau Hmoov Dab tsi yog silicon hlau 441 553 1101 2202 3303? Silicon Hlau 3303 2202 1101 FERRO Vanadium 40 60 80} hauv Suav teb Dab tsi yog ferrro silicon 45 65 72 75} siv rau? Dab tsi yog siv ntawm electrolytic manganese hlau flakes? Dab tsi yog qhov zoo ntawm cov lus silicon?
