Silo and steam locomotive: what they have in common

1. Step 1. Silo — works like — Grain elevator. A grain elevator and a silo are tall stores filled from the top.
2. Step 2. Grain elevator — has part — Watt steam engine. Dart’s first elevator was steam-driven.
3. Step 3. Watt steam engine — is part of — Steam locomotive. A steam locomotive is driven by a steam engine.

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