Eekanna simenti, ti a mọ nigbagbogbo bi eekanna irin, jẹ eekanna, lilo iṣelọpọ irin erogba, ohun elo ni irin 45 tabi irin 60, lẹhin iyaworan waya, annealing, ṣiṣe eekanna, quenching ati awọn ilana miiran, nitorinaa sojurigindin jẹ lile lile.Iṣẹ rẹ ni lati kan àlàfo diẹ ninu awọn eekanna lile miiran lori ...
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