紫銅 T1/T2/T3

紫銅 T1/T2/T3
化學成分：
Bi:≤0.001
Sb:≤0.002
As:≤0.002
Fe:≤0.005
Ni:≤0.002
Pb:≤0.003
Sn:≤0.002
S:≤0.005
Zn:≤0.005
O:≤0.02