QAL9-4铝青铜棒 QA110-3-1.5铝青铜棒 C95400铝青铜棒 C3561铅黄铜棒 QSn7-0.2 锡磷青铜棒材 CuFe2P 铜带材 C18150铜板材 CuCrZr 铜合金 CW107C 铜合金 C18400 C3771铅黄铜棒材 C3710 铅黄铜棒材 C3713铜棒 LB5-C铸造锡青铜 SAE66青铜合金