http://pastport.jp/user/Ruiyuan ja-JP RuiYuan is the market and technology leader in China in the field of metal printing and coating equipment manufacturing. 2022-04-06T10:33:16+0900 http://pastport.jp/user/Ruiyuan/timeline/Ruiyuan Ruiyuan http://pastport.jp/user/Ruiyuan/timeline/Ruiyuan