Compressed air and saw: what they have in common

1. Step 1. Compressed air — is used in — Dental drill. Compressed air.
2. Step 2. Dental drill — has part — Turbine. An air-driven turbine handpiece.
3. Step 3. Turbine — evolved from — Water wheel. The water turbine evolved from the water wheel.
4. Step 4. Water wheel — is part of — Sawmill. Early sawmills were driven by water wheels.
5. Step 5. Sawmill — uses — Saw. The cutting tool is a saw.

Open Evothings