Joint replacement and programmable logic controller: what they have in common

1. Step 1. Joint replacement — is made of — Titanium. A titanium stem.
2. Step 2. Titanium — is material for — Mars rover. The wheels and parts are aluminium and titanium.
3. Step 3. Mars rover — has part — Industrial robot. A robotic arm.
4. Step 4. Industrial robot — is used in — Industrial automation. Robots.
5. Step 5. Industrial automation — uses — Programmable logic controller. Controllers.

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