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3 ago 1877 ano - Se ordena colocar resguardos a las máquinas (Alemania)
Adicionado na linha do tempo:
Revisión histórica de la salud ocupacional y la seguridad industrial
By
Daniel Obando
7 dez 2017
0
0
2504
Data:
3 ago 1877 ano
Agora
~ 147 years ago
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