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Corundum refining furnace patent
Corundum refining furnace patent
Patent for secondary compensation device
Patent for secondary compensation device
Patent for electrode clamp
Patent for electrode clamp
Electrode clamp
Electrode clamp
Conductive cross arm patent
Conductive cross arm patent
Patent certificate1
Patent certificate1
Patent certificate
Patent certificate
Metallurgical furnace patent
Metallurgical furnace patent
Patent for flue
Patent for flue
Patent for rotating water-cooled cables
Patent for rotating water-cooled cables
Patent for new water-cooled cables
Patent for new water-cooled cables
Patent for water-cooled cables with external fixed metal components
Patent for water-cooled cables with external fixed metal components
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