QAl7铝青铜棒
QSn7-0.2锡青铜
ZCuSn10Pb5锡青铜
ZCuSn10Pb1锡青铜
CuNi2Si含硅镍铜
ZCuPb10Sn10(10-10)铸造铅青铜
ZCuPb20Sn5(20-5)铸造铅青铜
1.7045结构钢
42Cr4结构钢
13661845828