2η Ημέρα Θερινης Ακαδημίας Μηχανικής 2020

https://www.facebook.com/watch/?v=315023603081366

https://www.facebook.com/serrescircuit/videos/460155798353291
 https://www.facebook.com/serrescircuit/photos/pcb.3583319471707920/3583307218375812