Mobile phone e tunnelling shield: o que têm em comum

1. Passo 1. Mobile phone — tem como parte — Printed circuit board. All of a phone's parts are soldered onto a printed circuit board.
2. Passo 2. Printed circuit board — faz parte de — Remote control. Inside a remote is a circuit board with buttons and an infrared LED.
3. Passo 3. Remote control — tem como parte — LED. An infrared LED.
4. Passo 4. LED — faz parte de — Street light. LEDs.
5. Passo 5. Street light — faz parte de — Tunnel. Lighting.
6. Passo 6. Tunnel — utiliza — Tunnelling shield. Shield tunnelling.

Abrir Evothings