Sonar transducer and aerosol can: what they have in common

1. Step 1. Sonar transducer — is part of — Echo sounder. It sends out a sound pulse.
2. Step 2. Echo sounder — uses — Sound wave. A sound pulse.
3. Step 3. Sound wave — is used in — Silencer. It damps sound waves.
4. Step 4. Silencer — is part of — Internal combustion engine. A silencer.
5. Step 5. Internal combustion engine — has part — Valve. Valves let in the mixture and let out the gases.
6. Step 6. Valve — is part of — Aerosol can. A valve.

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