Kabushiki Kaisha Sensor Gijutsu Kenkyujo

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Method of protecting eyes from welding rays in arc welding and appa...
- Patent number 4,638,146
- Issue date Jan 20, 1987
- Nagase Sangyo Kabushiki Kaisha
- Ario Koyama
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

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