Corrugated steel walls and pneumatic tube: what they have in common

1. Step 1. Corrugated steel walls — is part of — Shipping container. Steel panels.
2. Step 2. Shipping container — is used in — Truck. A container moves from ship to truck without being unloaded.
3. Step 3. Truck — has part — Air brake. Air brakes, as on trains.
4. Step 4. Air brake — uses — Compressed air. The brake is controlled by air pressure in the train pipe.
5. Step 5. Compressed air — is used in — Pneumatic tube. Air pressure.

Open Evothings