供应hpb59-1铜板ZCuSn10Pb1五金耐磨锡青铜6
供应CAC302高强度黄铜棒CAC301铜板CAC701 C
供应10-3-1.5铝青铜 qal10-3-1.5 铝青铜棒
现货C3600方棒C3602铜材C3604黄铜圆棒C9320
供应紫铜薄板 1.2mm厚铜板材 T2止水带 紫铜
批发C87800硅黄铜棒 硅黄铜板 铸造铜合金 Z
弹簧钢60Si2Mn圆钢42CrMo圆棒60Si2Mn小规格
批发H68黄铜材料CAC604铅青铜棒LBC4铅青铜