Log well frame and smartphone: what they have in common

1. Step 1. Log well frame — is part of — Well. Shoring the walls against collapse.
2. Step 2. Well — uses — Windlass. The bucket was raised with a windlass.
3. Step 3. Windlass — uses — Wheel. A windlass is a wheel and axle used as a simple machine.
4. Step 4. Wheel — is part of — Lunokhod. Wheels.
5. Step 5. Lunokhod — has part — Smartphone camera. TV cameras.
6. Step 6. Smartphone camera — is part of — Smartphone. One or more cameras.

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