主营:模具钢材+五金钢材+特殊钢材+铜.铝.不锈钢+S136+SKD11+skh51+铍铜.白.黄铜+718+DC53+钨钢+合金铝+NAK80+2379+ASP-23+301.304+2316+DF-2+ASP-60