I-1.Ukuqaliswa ngokubanzi kwentsimbi yokusika insimbi yamahhala, iphinda ibhekiselele njengentsimbi ye-free-machining, insimbi ye-alloy ngokudibanisa enye okanye ngaphezulu kwezinto zokusika ezikhululekile ezifana nesulfure, i-phosphorus, i-lead, i-calcium, i-selenium kunye ne-tellurium ukuya. ukuphucula ipropati yayo yokusika.Intsimbi yokusika yasimahla i...
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