QSn7-0.2锡磷青铜棒 G-CuSn7ZnPb锡青铜棒材 Gs-CuSn7Zn4Pb6锡青铜棒材 CC493K-GS锡青铜棒材 CuSn7Zn4Pb7-C-GS锡青铜棒材 QAL10-5-5 铝镍青铜棒材 GZ-CuAl10Ni 铝镍青铜棒 Gc-CuAl11Fe4Ni4铝镍青铜棒材 CuAl10Fe5Ni5-C-GZ 铝青铜棒材 GK-CuAl10Fe铝青铜棒材 QAL10-4-4 铝镍青铜棒材 Gc-CuAl11Fe4 铝镍青铜棒 CC331G-GM 铝镍青铜棒材 工业冶金除气除渣清渣剂 晶粒提高成品铝件钛硼细化剂