Senku and the kingdom learns of a mysterious disc left behind by his father and the other astronauts. They use their newfound technology to bring it to life.
We've cleared vacuum tubes!
!أنهينا أنابيب التفريغ
Die Elektronenröhre ist fertig!
¡Tenemos tubos de vacío!
¡Tenemos tubos de vacío!
Tout comme le tube à vide !
La valvola termoionica è stata completata!
Nós conseguimos os tubos de vácuo!