政田 辰三郎
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Masata
政田
Tatsusaburō
辰三郎
Useful Metallic Plates Newly Produced
Published in: Kōgei Nyūsu, Volume 23, Issue 10
Technique: Plating Iron & Improved Zinc Plating
Published in: Kōgei Nyūsu, Volume 23, Issue 1
Technique: Spot Welding of Aluminium
Published in: Kōgei Nyūsu, Volume 23, Issue 6