Refrigerator car and kiln: what they have in common

1. Step 1. Refrigerator car — has part — Bogie. Bogies.
2. Step 2. Bogie — is part of — Diesel locomotive. Bogies with wheelsets.
3. Step 3. Diesel locomotive — evolved from — Steam locomotive. It replaced the steam locomotive.
4. Step 4. Steam locomotive — has part — Chimney. Smoke from the firebox leaves through the locomotive's chimney.
5. Step 5. Chimney — is part of — Kiln. The chimney creates a draught.

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