CuNi30, Cupro Nickel, 백동, C71500, Def-Stan steelmax2018-12-31T18:10:07+09:003월 24th, 2018| CuNi30, Cupro Nickel, 백동, ASTM C71500, 쿠니, Def-Stan 02-780, JIS C7150 으로 Standard 별, Designation/Steel symbol 이 각각
