4. Metallurgical apparatus
  5. Means for treating ores or for extracting metals
  6. By means applying heat to work, e.g., furnace

Kai Seppälä

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Cooling element

Metallurgical apparatus – Means for treating ores or for extracting metals – By means applying heat to work – e.g. – furnace
Reexamination Certificate

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Cooling element and method for manufacturing the same

Metallurgical apparatus – Process – Cooling
Reexamination Certificate

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