Rocket service tower gantry e voltaic pile: o que têm em comum

1. Passo 1. Rocket service tower gantry — faz parte de — Launch complex. Towers for access to the rocket.
2. Passo 2. Launch complex — utiliza — Rocket. Launching rockets.
3. Passo 3. Rocket — evoluiu para — Liquid-propellant rocket engine. Goddard switched to liquid fuel.
4. Passo 4. Liquid-propellant rocket engine — utiliza — Hydrogen. Hydrogen is an efficient fuel.
5. Passo 5. Hydrogen — utiliza — Eletrólise. Hydrogen is produced by electrolysis of water.
6. Passo 6. Eletrólise — evoluiu de — Voltaic pile. The first electrolysis of water was powered by a voltaic pile.

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