Electron and bellows: what they have in common

1. Step 1. Electron — is used in — Electron microscope. A beam of electrons instead of light.
2. Step 2. Electron microscope — has part — Vacuum pump. A vacuum in the column.
3. Step 3. Vacuum pump — has part — Check valve. Valves stop air from flowing back.
4. Step 4. Check valve — is part of — Bellows. An air intake valve.

Open Evothings