Locomotiva elétrica e watt steam engine: o que têm em comum

1. Passo 1. Locomotiva elétrica — tem como parte — Railway coupling. An electric locomotive pulls its wagons through a coupling.
2. Passo 2. Railway coupling — faz parte de — Steam locomotive. A locomotive hooks up its wagons with a coupling.
3. Passo 3. Steam locomotive — tem como parte — Watt steam engine. A steam locomotive is driven by a steam engine.

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