Open-hearth furnace e electric generator: o que têm em comum

1. Passo 1. Open-hearth furnace — é feito de — Tijolo. An open-hearth furnace is built of firebrick.
2. Passo 2. Tijolo — é material para — Power station. The buildings of the first power stations were brick.
3. Passo 3. Power station — tem como parte — Electric generator. Generators produce the current.

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