进口QBe2铍青铜棒,QAL5铝青铜棒材,线材
W70进口钨铜棒QA19-5..
QA19-5-1-1铝青铜棒..
进口铬锆铜CuNi3Si(2..
进口QBe2铍青铜棒,QAL..
QCr0.5,QBe1.7,..
进口铬青铜,QCr0.5,Q..