4. Industrial electric heating furnaces
  5. Arc furnace device
  6. Power supply system

Halvard Tveit

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Method for production of white microsilica

Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Reexamination Certificate

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Method for weighing electrodes in electric smelting furnaces

Industrial electric heating furnaces – Arc furnace device – Power supply system
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2141032

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