Heating stove e rolling mill: o que têm em comum

1. Passo 1. Heating stove — tem como parte — Chaminé. A chimney.
2. Passo 2. Chaminé — faz parte de — Steam locomotive. Smoke from the firebox leaves through the locomotive's chimney.
3. Passo 3. Steam locomotive — utiliza — Railway track. It runs on rails.
4. Passo 4. Railway track — utiliza — Rolling mill. Rails are rolled.

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