Puddling and internal combustion engine: what they have in common

1. Step 1. Puddling — is used in — Wrought iron. The puddling process.
2. Step 2. Wrought iron — is material for — Michaux velocipede. The frame is wrought iron.
3. Step 3. Michaux velocipede — has part — Pedal. Pedals.
4. Step 4. Pedal — is part of — Moped. A moped can be pedalled.
5. Step 5. Moped — has part — Internal combustion engine. A small-displacement combustion engine.

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