Derailleur and syringe: what they have in common

1. Step 1. Derailleur — is part of — Mountain bike. Many gears.
2. Step 2. Mountain bike — has part — Suspension fork. A suspension fork.
3. Step 3. Suspension fork — has part — Shock absorber. A shock absorber.
4. Step 4. Shock absorber — has part — Piston. Inside, a piston moves in oil.
5. Step 5. Piston — is part of — Syringe. A plunger.

Open Evothings