CT scanner and shipping container: what they have in common

1. Step 1. CT scanner — has part — Ball bearing. The gantry turns on a bearing.
2. Step 2. Ball bearing — is part of — Bogie. Axle boxes with roller bearings.
3. Step 3. Bogie — is part of — Diesel locomotive. Bogies with wheelsets.
4. Step 4. Diesel locomotive — has part — Air brake. Air brakes.
5. Step 5. Air brake — is part of — Truck. Air brakes, as on trains.
6. Step 6. Truck — uses — Shipping container. A container moves from ship to truck without being unloaded.

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