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Chemical requirements Element Ni Mg Fe Pb Al Bi Si Cd Ca P Concentration(%) 0.003 0.002 0.005 0.0001 0.002 0.0001 0.002 0.0001 0.002 0.001 Element C O N Sb Sn Mo Concentration(%) 0.01 0.003 0.003 0.0005 0.0001 balance
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