// todo need optimize like in event.jsp. Add indexing or not indexing this page. hearing aids invented (2 gen 1923 anni – 3 marzo 1925 anni) (Il nastro del tempo)
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hearing aids invented (2 gen 1923 anni – 3 marzo 1925 anni)

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ByAnna Huey
19 nov 2018

Data:

2 gen 1923 anni
3 marzo 1925 anni
~ 2 years and 2 months
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