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Here's how you make a vacuum tube: https://www.youtube.com/watch?v=EzyXMEpq4qw https://www.youtube.com/watch?v=EzyXMEpq4qw
by Koshkin 5y ago
Here's how you make a vacuum tube:
https://www.youtube.com/watch?v=EzyXMEpq4qw https://www.youtube.com/watch?v=EzyXMEpq4qw