Isanti egqwesileyo ekususweni kwengubo epheleleyo, ipeyinti, imingxunya, ukungcola, isikali, i-slag, kunye ne-oxidotion ngaphezulu kweendawo zonke eziphezulu. Iindawo okanye amabala kwinxalenye kunokuba nzima ukufikelela xa usebenzisa i-disc disc, ivili le-flap, okanye i-wire ivili. Kukhokelela kwimimandla (
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