Musket and autoclave: what they have in common

1. Step 1. Musket — has part — Flintlock. A flintlock.
2. Step 2. Flintlock — has part — Spring. A mainspring.
3. Step 3. Spring — is part of — Safety valve. A spring-loaded valve.
4. Step 4. Safety valve — is part of — Autoclave. A safety valve releases pressure.

Open Evothings