4. Optics: measuring and testing
  5. By dispersed light spectroscopy
  6. Utilizing a spectrometer

Yasuhiko Nishi

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Apparatus for automatically welding cylindrical vessel

Electric heating – Metal heating – By arc
Patent

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Automatic arc-welding method

Electric heating – Metal heating – By arc
Patent

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Automatic arc-welding method

Electric heating – Metal heating – By arc
Patent

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Automatic arc-welding method

Electric heating – Metal heating – By arc
Patent

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DC relay

Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – With arc-suppression or extinguishing means
Reexamination Certificate

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Profile ID: LFUS-PAI-P-154054

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