Insulator and dewar flask: what they have in common

1. Step 1. Insulator — is part of — Power line. Insulators on the towers.
2. Step 2. Power line — has part — Copper wire. Wires (often aluminium).
3. Step 3. Copper wire — is part of — Electromagnet. A winding.
4. Step 4. Electromagnet — is part of — Cyclotron. A magnet.
5. Step 5. Cyclotron — uses — Vacuum. Particles fly in a vacuum.
6. Step 6. Vacuum — is used in — Dewar flask. A vacuum.

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