Geodesic dome and watt steam engine: what they have in common

1. Step 1. Geodesic dome — has part — Truss. A triangular grid.
2. Step 2. Truss — is part of — Truss bridge. Trusses.
3. Step 3. Truss bridge — uses — Railway track. Railway bridges.
4. Step 4. Railway track — is used in — Steam locomotive. It runs on rails.
5. Step 5. Steam locomotive — has part — Watt steam engine. A steam locomotive is driven by a steam engine.

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