Autoclave and r-7 rocket: what they have in common

1. Step 1. Autoclave — has part — Boiler. A steam generator.
2. Step 2. Boiler — is part of — Steam turbine. Steam from the boiler.
3. Step 3. Steam turbine — evolved into — De Laval nozzle. De Laval invented the nozzle for a steam turbine.
4. Step 4. De Laval nozzle — is part of — Liquid-propellant rocket engine. A nozzle.
5. Step 5. Liquid-propellant rocket engine — is part of — R-7 rocket. RD-107 and RD-108 engines.

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