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1 sept 400 año aC - cross staff

Descripción:

The cross-staff is an instrument used to measure angles and altitudes, consisting of a trigonometrically graduated staff and one or more perpendicular vanes moving over it.

Añadido al timeline:

13 nov 2017
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0
356

fecha:

1 sept 400 año aC
Ahora mismo
~ 2426 years ago