Breakwater and turbine: what they have in common

1. Step 1. Breakwater — is made of — Concrete. Concrete blocks.
2. Step 2. Concrete — is material for — Hydroelectric power station. The dam and powerhouse are concrete.
3. Step 3. Hydroelectric power station — has part — Water turbine. Water turbines.
4. Step 4. Water turbine — is a kind of — Turbine. A kind of turbine.

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