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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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5 h 36 m, 14 mayo 1816 año - 1816 the newly invented davy safety lamp was used for the first time it reduced the risk of explosions improving safety underground
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timeline Aidan 1
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Blwyddyn 6
13 nov 2017
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5 h 36 m, 14 mayo 1816 año
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