LEGO bricks and LIGO: what they have in common

1. Step 1. LEGO bricks — uses — Interchangeable parts. Any brick fits any other.
2. Step 2. Interchangeable parts — is used in — Assembly line. Flow production is only possible with interchangeable parts.
3. Step 3. Assembly line — uses — Conveyor belt. The product moves between stations on a conveyor.
4. Step 4. Conveyor belt — has part — Ball bearing. The rollers turn on bearings.
5. Step 5. Ball bearing — is part of — Base isolation. Friction pendulum bearings.
6. Step 6. Base isolation — is part of — LIGO. The suspension damps ground vibrations.

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