Awọn irin be ara ni o ni awọn anfani ti ina àdánù, ti o dara toughness, ga agbara, lagbara ṣiṣu, ati ki o rọrun manufacture, ki o jẹ gidigidi gbajumo laarin awọn àkọsílẹ.Gẹgẹbi paati pataki, ọmọ ẹgbẹ igbekale irin jẹ iduro fun atilẹyin.Nitoripe irin be componen...
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