Solder und modem: was sie gemeinsam haben

1. Schritt 1. Solder — wird verwendet in — Printed circuit board. Components are soldered on.
2. Schritt 2. Printed circuit board — ist Teil von — Mobile phone. All of a phone's parts are soldered onto a printed circuit board.
3. Schritt 3. Mobile phone — entwickelte sich aus — Telephone. A mobile phone keeps the function of a telephone, replacing the wire with a radio channel.
4. Schritt 4. Telephone — wird verwendet in — Modem. It works over a telephone line.

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