Launch escape tower and steam turbine: what they have in common

1. Step 1. Launch escape tower — is part of — Saturn V. A tower that pulls the spacecraft away in an emergency.
2. Step 2. Saturn V — uses — Liquid-propellant rocket engine. All stages use liquid-propellant engines.
3. Step 3. Liquid-propellant rocket engine — has part — De Laval nozzle. A nozzle.
4. Step 4. De Laval nozzle — evolved from — Steam turbine. De Laval invented the nozzle for a steam turbine.

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