Morse code and dewar flask: what they have in common

1. Step 1. Morse code — is used in — Electrical telegraph. Morse encoding.
2. Step 2. Electrical telegraph — has part — Electromagnet. Morse’s receiver.
3. Step 3. Electromagnet — is part of — Cyclotron. A magnet.
4. Step 4. Cyclotron — uses — Vacuum. Particles fly in a vacuum.
5. Step 5. Vacuum — is used in — Dewar flask. A vacuum.

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