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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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31 mar 1939 año - siemens
Descripción:
siemens produced the first commercial transmission electron micrscope
Añadido al timeline:
alex
By
Alexander Brusacoram
30 oct 2017
0
0
521
fecha:
31 mar 1939 año
Ahora mismo
~ 86 years ago
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