Yunnan speckle copper is come from nonferrous metal kingdom of Yunnan province,which is well known and unique type copper alloy smelt product in the world.是什么意思_Yunnan speckle copper is come from nonferrous metal kingdom of Yunnan province,which is well known and unique type copper alloy smelt product in the world.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句