2020년 1월 6일Categories Copper Alloy Non-Ferrous(비철)Alloy 770, Nickel Silver 770, C77000, German SilverAlloy 770, Nickel Silver 770, C77000, German Silver STEELMAX Metal Story Alloy 770 동합금은, 55% Copper, 27% Nickel, 18% Zinc 합금입니다. 니켈 합금에 […]