Pressure chamber and electrical grid: what they have in common

1. Step 1. Pressure chamber — is part of — Autoclave. A sealed chamber.
2. Step 2. Autoclave — has part — Boiler. A steam generator.
3. Step 3. Boiler — is part of — Thermal power station. Boilers.
4. Step 4. Thermal power station — is a kind of — Power station. A kind of power station.
5. Step 5. Power station — is part of — Electrical grid. Power stations feed the grid.

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