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元の木製ケース入りのFullerのスパイラル計算尺（ノメグラム付き）

Règle à calcul spirale de Fuller avec abaque dans son étui en bois d'origine

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計算尺  - Fuller計算尺

France - Wood - 1850-1900

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Fuller spiral slide rule with an abacus, in mahogany, dating from 1850–1900, in good condition with some wear and stains, housed in its original wooden case, measures 45.5 cm wide by 16.5 cm high by 11 cm deep and weighs 3.4 kg, France origin.

計算尺 - Fuller計算尺

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Fuller spiral slide rule with an abacus, in mahogany, dating from 1850–1900, in good condition with some wear and stains, housed in its original wooden case, measures 45.5 cm wide by 16.5 cm high by 11 cm deep and weighs 3.4 kg, France origin.

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