saigaogroupの公開自分史 http://pastport.jp/user/saigaogroup ja-JP SHANDONG SAIGAO GROUP CORPORATION Saigao Group specializing in design, and manufacturing, sales and export of Oil,gas water drilling equipments, such as Casing. 2020-07-27T12:53:38+0900 http://pastport.jp/user/saigaogroup/timeline/SHANDONG%20SAIGAO%20GROUP%20CORPORATION saigaogroup http://pastport.jp/user/saigaogroup/timeline/SHANDONG%20SAIGAO%20GROUP%20CORPORATION