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| View Original: | Yazu Arithmometer.png (2991x2160) | |||
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| Keywords: Yazu Arithmometer.png en Schematic of Patented Yazu Arithmometer Japan Patent No 6010 Fig 1 1903 ja 矢頭良 の 自働算盤 日 国特許6010番 第1図 1903年 Source 日 国特許6010番 Uploaded by MetaNest Uploaded on December 12 2013 Mechanical calculators Patent drawings Patents from Japan PD-Japan | ||||
