Spring balance and shipping container: what they have in common

1. Step 1. Spring balance — has part — Spring. A spring.
2. Step 2. Spring — includes — Leaf spring. A spring.
3. Step 3. Leaf spring — is part of — Truck. Leaf-spring suspension.
4. Step 4. Truck — uses — Shipping container. A container moves from ship to truck without being unloaded.

Open Evothings