牌号:H68标准:GB/T 4423-1992●化学成份:铜 Cu :67.0~70.0锌 Zn:余量铅 Pb:≤0.03铅 Pb:≤0.03硼 P:≤0.01铁 Fe:≤0.10铍 Sb :≤0.005铋 Bi:≤0.002注:≤0.3(杂质··································