Trouser legs e nuclear reactor: o que têm em comum

1. Passo 1. Trouser legs — faz parte de — Trousers. Two legs.
2. Passo 2. Trousers — utiliza — Needle. Trousers were sewn with a needle.
3. Passo 3. Needle — faz parte de — Syringe. A hollow needle.
4. Passo 4. Syringe — é feito de — Silver. Early needles were silver.
5. Passo 5. Silver — é material para — Barra de controle. Control rods of pressurized water reactors are a silver–indium–cadmium alloy.
6. Passo 6. Barra de controle — faz parte de — Nuclear reactor. The rods control the power.

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