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3 agos 1877 año - Se ordena colocar resguardos a las máquinas (Alemania)
Añadido al timeline:
Revisión histórica de la salud ocupacional y la seguridad industrial
By
Daniel Obando
7 dic 2017
0
0
1986
fecha:
3 agos 1877 año
Ahora mismo
~ 146 years ago
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