Draft tube and industrial robot: what they have in common

1. Step 1. Draft tube — is part of — Water turbine. It carries away water and recovers some of the energy.
2. Step 2. Water turbine — is part of — Hydroelectric power station. Water turbines.
3. Step 3. Hydroelectric power station — has part — Electric generator. Generators.
4. Step 4. Electric generator — includes — Solar panel. A solar panel also generates electricity — from light rather than rotation.
5. Step 5. Solar panel — is part of — International Space Station. Solar panels.
6. Step 6. International Space Station — has part — Industrial robot. The Canadarm2 robotic arm.

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