Shell and tube heat exchanger and boyle’s air pump: what they have in common

1. Step 1. Shell and tube heat exchanger — is part of — Chemical plant. It heats and cools the flows.
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 — Gas stove. The fuel is gas.
5. Step 5. Gas stove — has part — Valve. Gas taps.
6. Step 6. Valve — is part of — Boyle’s air pump. Valves.

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