Flight recorder and conveyor belt: what they have in common

1. Step 1. Flight recorder — is made of — Titanium. The case is titanium or stainless steel.
2. Step 2. Titanium — is material for — Joint replacement. A titanium stem.
3. Step 3. Joint replacement — has part — Ball bearing. A “ball in a cup” joint — like a plain bearing.
4. Step 4. Ball bearing — is part of — Conveyor belt. The rollers turn on bearings.

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