Mechanical sweep cable and greenhouse: what they have in common

1. Step 1. Mechanical sweep cable — is part of — Minesweeper. It cuts the mine moorings.
2. Step 2. Minesweeper — uses — Landmine. Against sea mines.
3. Step 3. Landmine — is made of — Cast iron. The casing is cast iron.
4. Step 4. Cast iron — is material for — Crystal Palace. Cast iron.
5. Step 5. Crystal Palace — was inspired by — Greenhouse. Paxton was a gardener and a builder of glasshouses.

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