Rivet and data centre: what they have in common

1. Step 1. Rivet — is part of — Steel frame. Early frames were riveted.
2. Step 2. Steel frame — is part of — Skyscraper. A steel frame.
3. Step 3. Skyscraper — has part — Foundation. A deep foundation.
4. Step 4. Foundation — is made of — Concrete. Concrete.
5. Step 5. Concrete — is material for — Data centre. The building is concrete.

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