发明授权 US218249A Improvement in machines for scraping tubes before and after soldering 失效 基本信息 请登陆查看更多内容 基本信息 请登陆查看更多内容 Improvement in machines for scraping tubes before and after soldering 专利标题: Improvement in machines for scraping tubes before and after soldering 申请号: US218249D 申请日: 公开(公告)号: US218249A 公开(公告)日: 1879-08-05 信息查询 Espacenet