Otk Possesses Advanced Technology That Is The Highest Level In The World. We Manufacture A Wide Variety Of Steel Pipe, Contributing To Many Industrial Fields Around The World.
⌖ 2-8-24 Mitejima, Nishiyodogawa-ku, Osaka City, Japan
✉ main@otk.ne.jp
+81 664753000
otk.ne.jp
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