4. Electric heating
  5. Metal heating
  6. Nonatmospheric environment at hot spot

Tadamasa Yamaguchi

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Four-electrode submerged arc welding process

Electric heating – Metal heating – By arc
Patent

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High-efficiency fillet welding method for steel plate

Electric heating – Metal heating – Nonatmospheric environment at hot spot
Patent

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Method of submerged arc welding a thick steel plate with large h

Electric heating – Metal heating – Nonatmospheric environment at hot spot
Patent

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Underground shelter

Static structures (e.g. – buildings) – Specified terranean relationship – Subterranean enclosure with portal opening; e.g. – storm or...
Reexamination Certificate

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Profile ID: LFUS-PAI-P-539483

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