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3 août 1877 - Se ordena colocar resguardos a las máquinas (Alemania)
Ajouté au bande de temps:
Revisión histórica de la salud ocupacional y la seguridad industrial
By
Daniel Obando
7 déc. 2017
0
0
2504
Date:
3 août 1877
Maintenaint
~ Il y a 147 ans
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