Cover and particle accelerator: what they have in common

1. Step 1. Cover — is part of — Ironing board. A heat-resistant cover.
2. Step 2. Ironing board — is used in — Electric iron. Ironing.
3. Step 3. Electric iron — has part — Heating element. A heater.
4. Step 4. Heating element — works like — Incandescent light bulb. A lamp and a heater use the same effect — a conductor heated by current; they differ in purpose, light or heat.
5. Step 5. Incandescent light bulb — uses — Vacuum. The bulb was evacuated so the filament would not burn out.
6. Step 6. Vacuum — is used in — Particle accelerator. A vacuum chamber.

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