主营:模具钢材+铍铜+石墨电极+铝板+钨钢+钛棒+透气钢+不锈钢+热作模具钢+R8650+R8510+E+25+E+40+E+50+1.4301+1.4057+1.4571+1.4542+1.4436+1.4401