Electric drill and syringe: what they have in common

1. Step 1. Electric drill — works like — Dental drill. The same task — spinning a drill bit; the foot-powered dental drill appeared before the electric drill.
2. Step 2. Dental drill — uses — Compressed air. Compressed air.
3. Step 3. Compressed air — is used in — Jackhammer. Compressed air.
4. Step 4. Jackhammer — has part — Piston. A percussion piston.
5. Step 5. Piston — is part of — Syringe. A plunger.

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