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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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Steady development of mechanical calculators -size reduction, electronic motor drive, and other added features 1900-1975 (12 ene 1900 año – 29 ene 1975 año)
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By
Floofypanda
15 sep 2017
0
0
663
fecha:
12 ene 1900 año
29 ene 1975 año
~ 75 years
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