Combustion and sewage treatment plant: what they have in common

1. Step 1. Combustion — is used in — Turbojet engine. Fuel burns in the combustion chamber.
2. Step 2. Turbojet engine — has part — Compressor. The compressor compresses the air.
3. Step 3. Compressor — is part of — Sewage treatment plant. Blowers supply oxygen to the microbes.

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