Stephenson’s Rocket and turbine: what they have in common

1. Step 1. Stephenson’s Rocket — is made of — Wrought iron. The boiler is wrought iron.
2. Step 2. Wrought iron — is material for — Ocean liner. The hull is iron, later steel.
3. Step 3. Ocean liner — has part — Turbine. Large liners run on steam turbines.

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