铜珠实心纯铜黄铜2/3/4/5/6/7/8/9/10/12/3.5/4.5/2.5mm精密铜球图片|铜珠实心纯铜黄铜2/3/4/5/6/7/8/9/10/12/3.5/4.5/2.5mm精密铜球样板图|铜珠实心纯铜黄铜2/3/4/5/6/7/8/9/10/12/3.5/4.5/2.5mm精密铜球效果图

实心铝球高纯铝珠0.5mm-12.7m...