4. Metallurgical apparatus
  5. Means treating solid metal
  6. By contact with gas

Ronald D. Rogers

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Circulating valve for wells

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Method and apparatus for circulating a heat treating gas

Metallurgical apparatus – Means treating solid metal – By contact with gas
Patent

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Method for circulating a heat treating gas

Heating – Processes of heating or heater operation – Controlling flame position or work atmosphere
Patent

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Profile ID: LFUS-PAI-P-947644

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