Shaft e relógio atômico: o que têm em comum

1. Passo 1. Shaft — faz parte de — Universal joint. Connects two shafts.
2. Passo 2. Universal joint — faz parte de — Automóvel. A universal joint carries rotation to the rear axle.
3. Passo 3. Automóvel — inclui — Self-driving car. A self-driving car is an ordinary car driven by a computer with cameras and sensors.
4. Passo 4. Self-driving car — tem como parte — GPS (satellite navigation). Satellite navigation.
5. Passo 5. GPS (satellite navigation) — utiliza — Relógio atômico. The satellites carry atomic clocks; the position is calculated from signal arrival times.

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