Bow thruster and particle accelerator: what they have in common

1. Step 1. Bow thruster — has part — Propeller. A propeller in a tunnel.
2. Step 2. Propeller — is part of — Airship. Air propellers.
3. Step 3. Airship — uses — Helium. After the Hindenburg — helium.
4. Step 4. Helium — is material for — Large Hadron Collider. It is cooled with superfluid helium.
5. Step 5. Large Hadron Collider — is a kind of — Particle accelerator. An accelerator.

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