Silo e steam locomotive: o que têm em comum

1. Passo 1. Silo — funciona como — Grain elevator. A grain elevator and a silo are tall stores filled from the top.
2. Passo 2. Grain elevator — tem como parte — Watt steam engine. Dart’s first elevator was steam-driven.
3. Passo 3. Watt steam engine — faz parte de — Steam locomotive. A steam locomotive is driven by a steam engine.

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