4. Metallurgical apparatus
  5. Means for melting or vaporizing metal or treating liquefied...
  6. By means introducing treating material
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Ootsuka Ryotatsu

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Osaka Iron & Steel Co., Ltd.

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Osterreichisch Amerikanische Magnesit Aktiengesellschaft

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Osterreichisch-Amerikanische Magnesit Aktiengessellschaft

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