Flight recorder and tank: what they have in common

1. Step 1. Flight recorder — is part of — Jet airliner. Flight recorders.
2. Step 2. Jet airliner — has part — Turbojet engine. Jet engines.
3. Step 3. Turbojet engine — is a kind of — Gas turbine. A turbojet is a gas turbine that produces thrust with a jet.
4. Step 4. Gas turbine — is part of — Tank. Some tanks (T-80, Abrams) have a gas turbine engine.

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