Treadmill and vacuum pump: what they have in common

1. Step 1. Treadmill — has part — Conveyor belt. A belt.
2. Step 2. Conveyor belt — is part of — Tunnel boring machine. Spoil is removed by a conveyor.
3. Step 3. Tunnel boring machine — has part — Hydraulic cylinder. Hydraulic cylinders push the machine forward.
4. Step 4. Hydraulic cylinder — is part of — Concrete pump. Hydraulics.
5. Step 5. Concrete pump — has part — Piston pump. A piston pump.
6. Step 6. Piston pump — evolved into — Vacuum pump. Guericke adapted the piston pump to pump out air.

Open Evothings