Silicon metal 553 Si 98.5% Fe < 0.50max Al < 0.50max Ca < 0.3omax Silicon metal 441 Si 99% Fe < 0.40max Al < 0.40max Ca < 0.10max Silicon metal 3303 Si 99.4% Fe < 0.30max Al < 0.30max Ca < 0.03max ...
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