Kite frame of sticks and steam locomotive: what they have in common

1. Step 1. Kite frame of sticks — is part of — Kite. Light battens set the plane and shape of the kite.
2. Step 2. Kite — evolved into — Space frame. Bell came up with the structure while building tetrahedral kites.
3. Step 3. Space frame — has part — Truss. Space trusses.
4. Step 4. Truss — is part of — Truss bridge. Trusses.
5. Step 5. Truss bridge — uses — Railway track. Railway bridges.
6. Step 6. Railway track — is used in — Steam locomotive. It runs on rails.

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