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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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19 ene 1939 año - siemens makes first commercial transmission electron mircoscope
Añadido al timeline:
biology timeline
By
Ashton Oveson
30 oct 2017
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434
fecha:
19 ene 1939 año
Ahora mismo
~ 86 years ago
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