供应金牌无氧铜C1100纯铜T2红铜红铜电极材料
供应金牌铸造青铜/C93200锡青铜/磷青铜
ZHPbD59-1材质证明-供应环保优质铸造黄铜ZHPbD59-1
ZHPbD65-2材质证明-供应环保优质铸造黄铜ZHPbD65-2
ZHMnD57-3-1材质证明-供应环保优质铸造黄铜ZHMnD57-3-1
ZHMnD58-2材质证明-供应环保优质铸造黄铜ZHMnD58-2
ZHMnD58-2-2材质证明-供应环保优质铸造黄铜ZHMnD58-2-2
ZHAlD61-2-2-1材质证明-环保优质铸造黄铜ZHAlD61-2-2-1
100CrMo7-3-制造滚珠、滚柱和轴承套圈的轴承钢100CrMo7-3
100CrMn6-制造滚珠、滚柱和轴承套圈的轴承钢100CrMn6