Wooden bellows boards and particle accelerator: what they have in common

1. Step 1. Wooden bellows boards — is part of — Bellows. Rigid walls.
2. Step 2. Bellows — has part — Check valve. An air intake valve.
3. Step 3. Check valve — is part of — Vacuum pump. Valves stop air from flowing back.
4. Step 4. Vacuum pump — uses — Vacuum. The pump creates a vacuum.
5. Step 5. Vacuum — is used in — Particle accelerator. A vacuum chamber.

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