进口c1100无锡紫铜棒镀锡紫铜棒易导电紫铜棒直径9.5mm量大价优

金属材料及制品^铜材^^^天津^进口c1100无锡紫铜棒镀锡紫铜棒易导电紫铜棒直径9.5mm量大价优