Billet ɗin Tube shine billet ɗin don samar da bututun ƙarfe maras sumul, kuma mafi yawan amfani da su a cikin ƙasata shine ci gaba da yin simintin simintin gyare-gyare da billet ɗin. Dangane da hanyar samar da bututun billet, ana iya raba shi zuwa: ingot, ci gaba da simintin simintin gyare-gyare, billet ɗin billet, yanki b...
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