Inhaler and micrometer: what they have in common

1. Step 1. Inhaler — has part — Valve. A metering valve.
2. Step 2. Valve — includes — Check valve. A kind of valve.
3. Step 3. Check valve — is part of — Jack. Check valves.
4. Step 4. Jack — uses — Screw. A screw jack.
5. Step 5. Screw — is used in — Micrometer. A precise screw with a 0.5 mm pitch.

Open Evothings