Multiple rocket launcher and autoclave: what they have in common

1. Step 1. Multiple rocket launcher — uses — Solid rocket motor. Rockets.
2. Step 2. Solid rocket motor — has part — De Laval nozzle. A nozzle.
3. Step 3. De Laval nozzle — evolved from — Steam turbine. De Laval invented the nozzle for a steam turbine.
4. Step 4. Steam turbine — has part — Boiler. Steam from the boiler.
5. Step 5. Boiler — is part of — Autoclave. A steam generator.

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