Awọn ohun elo ohun elo igi jẹ ohun elo erogba, irin ohun elo alloy, irin giga-iyara, carbide cemented, cubic boron nitride, diamond sintetiki, ati bẹbẹ lọ, awọn ohun elo irinṣẹ lati inu ohun elo erogba si idagbasoke ti carbide cemented, ti n ṣe afihan awọn ilọsiwaju imọ-ẹrọ ni cu. ..
Ka siwaju