hs201紫铜s221锡黄铜211硅青铜214铝青铜焊丝sg-cusn12锡青铜焊丝

铝青铜焊丝 s214 硅青铜焊丝磷青铜 s211 紫铜焊丝 s201 锡黄铜焊丝

铝青铜焊丝 s214 硅青铜焊丝磷青铜 s211 紫铜焊丝 s201 锡黄铜焊丝

日出批发hs221铜焊条锡青铜焊条黄铜焊条1.6mm2.0mm2.5mm3.0mm4.

s212,铜焊丝,锡青铜焊丝