Rail vehicle and bellows: what they have in common

1. Step 1. Rail vehicle — includes — Electric locomotive. A rail machine.
2. Step 2. Electric locomotive — is part of — Panama Canal. Electric “mules” tow the ships through the locks.
3. Step 3. Panama Canal — has part — Canal lock. Locks.
4. Step 4. Canal lock — has part — Valve. Sluice gates.
5. Step 5. Valve — is part of — Bellows. A valve in the bellows lets air in when they open and keeps it from escaping back.

Open Evothings