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1 ene 1950 año - Pacemaker

Descripción:

Heart pacemaker was invented in a National Research Council laboratory in Ottawa by Winnipeg native John Hops to keep weak of heart alive and kicking.

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Relevant History

ByCindy Kilpatrick
7 feb 2020

fecha:

1 ene 1950 año
Ahora mismo
~ 74 years ago
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