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Duplex ruler (14 ore 39 min, 21 nov 2018 anni – 14 ore 49 min, 1 lugl 2019 anni)

Descrizione:

In 1891 The duplex rule was invented by William Cox

Aggiunto al nastro di tempo:

Counting/Caculating Inventions

4 nov 2019

0

0

360

Data:

14 ore 39 min, 21 nov 2018 anni

14 ore 49 min, 1 lugl 2019 anni

~ 7 months

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