(A) An intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide)
(B) Iron impregnated with resin (usually Bakelite)
(C) Carbon free iron
(D) None of these
(A) An intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide)
(B) Iron impregnated with resin (usually Bakelite)
(C) Carbon free iron
(D) None of these
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