Sprinkler and bell: what they have in common

1. Step 1. Sprinkler — has part — Valve. A glass-bulb valve.
2. Step 2. Valve — is part of — Valve trumpet. Valves.
3. Step 3. Valve trumpet — uses — Resonance. Resonance of the tube.
4. Step 4. Resonance — is used in — Bell. The sound.

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