2023년 8월 13일Categories Copper Alloy Non-Ferrous(비철)B505 C83600 Leaded Bearing Bronze Cu-AlloyB505 C83600 Leaded Bearing Bronze Cu-Alloy STEELMAX Metal Story ASTM B505 C83600 합금은 납 (Pb : 鉛 : 연)을 5% 수준을 합금한 연입 […]