Category:Calculating rods in the Ridai Museum of Modern Science
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Media in category "Calculating rods in the Ridai Museum of Modern Science"
The following 4 files are in this category, out of 4 total.
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Sanban calculating rods - Ridai Museum of Modern Science, Tokyo - DSC07452.JPG 4,966 × 2,564; 7.24 MB
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Sanban calculating rods - Ridai Museum of Modern Science, Tokyo - DSC07453.JPG 4,913 × 3,186; 6.92 MB
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Sanban calculating rods - Ridai Museum of Modern Science, Tokyo - DSC07454.JPG 5,463 × 2,457; 6.76 MB
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Sanban calculating rods - Ridai Museum of Modern Science, Tokyo - DSC07455.JPG 5,215 × 2,670; 6.38 MB