Programmable logic controller and autoclave: what they have in common

1. Step 1. Programmable logic controller — is part of — Chemical plant. Process control automation.
2. Step 2. Chemical plant — has part — Pipeline. Pipelines between the vessels.
3. Step 3. Pipeline — is used in — Natural gas. Gas is transported through pipes.
4. Step 4. Natural gas — is used in — Thermal power station. Gas.
5. Step 5. Thermal power station — has part — Boiler. Boilers.
6. Step 6. Boiler — is part of — Autoclave. A steam generator.

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