Bike lane and piston pump: what they have in common

1. Step 1. Bike lane — is a kind of — Paved road. A road.
2. Step 2. Paved road — has part — Mortar. Roman roads had layers set in mortar.
3. Step 3. Mortar — evolved into — Roman concrete. Roman concrete developed from lime mortars.
4. Step 4. Roman concrete — evolved into — Concrete. A revival of Roman technology.
5. Step 5. Concrete — is used in — Concrete pump. It pumps concrete.
6. Step 6. Concrete pump — has part — Piston pump. A piston pump.

Open Evothings