Vacuum pump oil e rocket: o que têm em comum

1. Passo 1. Vacuum pump oil — faz parte de — Vacuum pump. It seals the gaps.
2. Passo 2. Vacuum pump — evoluiu de — Piston pump. Guericke adapted the piston pump to pump out air.
3. Passo 3. Piston pump — faz parte de — Bomba de concreto. A piston pump.
4. Passo 4. Bomba de concreto — utiliza — Concreto. It pumps concrete.
5. Passo 5. Concreto — é material para — Launch complex. The launch table is concrete.
6. Passo 6. Launch complex — utiliza — Rocket. Launching rockets.

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