Whistling kettle and industrial robot: what they have in common

1. Step 1. Whistling kettle — has part — Whistle. A whistle.
2. Step 2. Whistle — uses — Sound wave. The sound of a flow.
3. Step 3. Sound wave — is used in — Drum. Sound.
4. Step 4. Drum — works like — Drum machine. An electronic drum.
5. Step 5. Drum machine — has part — Microprocessor. A processor sets the rhythm.
6. Step 6. Microprocessor — is part of — Industrial robot. A microprocessor-based controller is in charge.

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