Incubator and tank: what they have in common

1. Step 1. Incubator — has part — Thermostat. Keeping the temperature.
2. Step 2. Thermostat — is part of — Refrigerator. A thermostat.
3. Step 3. Refrigerator — has part — Compressor. A compressor with an electric motor.
4. Step 4. Compressor — is part of — Gas turbine. A compressor.
5. Step 5. Gas turbine — is part of — Tank. Some tanks (T-80, Abrams) have a gas turbine engine.

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