Yes. The real secret of the machine is in the relativity tube. But it'll take months to reproduce it.
9 seconds sound clip from Superman (1948) - Hurled To Destruction (Chapter 13).
You can hear this line at 00:06:33.043 in the Blu-ray version of the episode.
Quote context
[...]
- Yes. He'll be completely at our command.
- Take him to the alcove, Driller.
- Yes. He'll obey your orders.
- I want you to complete our duplicate of your ray machine.
- Is there anything else you need besides the mono chromite?
- But that tube is in the instrument at the Metropolis University, isn't it?
- Yes.
- Draw a diagram of its location, and tell how it can be detached.
- You'll never get it. The place is too well-guarded.
- Not for a plan which has just occurred to me.
- Kent, here's the exclusive story for you and Jimmy: a modern-science layout on the ray machine.
[...]