锡黄铜焊丝,焊丝和焊条

斯米克s221锡黄铜焊丝氩弧焊丝钎焊电焊丝电焊条
上海申澳s221登月牌锡黄铜焊丝0.8mm/1.0mm/1.2mm/1.6m
上海s221锡黄铜气保焊丝 scu6810a黄铜焊丝 紫铜焊丝 221铜焊丝
s221锡黄铜焊丝hs221铜焊条1米2.5/3.0mm铜铁焊接合金刀黄铜焊条
s221锡黄铜焊条/铜合金焊丝/铜铁专用焊接1.6 2.0 2.5 3.0 4.0mm