Gukoresha imiti ya ferrosilicon: Kugeza ubu, amashusho ya moteri ya lisansi na mazutu muri rusange bikozwe mu byuma, ibyuma bivangwa n’ibyuma, hamwe n’ibyuma byangiza, kandi bigakoresha uburyo bwo kuzimya cyangwa gukonja bikonje (alloy cast iron process) kugirango byuzuze ibisabwa byuzuye ...
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