Water filter e electric generator: o que têm em comum

1. Passo 1. Water filter — utiliza — Gravity flow. Water seeps through by gravity.
2. Passo 2. Gravity flow — é utilizado em — Water turbine. It is turned by falling water.
3. Passo 3. Water turbine — faz parte de — Hydroelectric power station. Water turbines.
4. Passo 4. Hydroelectric power station — tem como parte — Electric generator. Generators.

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