Artificial heart valve and radio: what they have in common

1. Step 1. Artificial heart valve — is made of — Titanium. Titanium and pyrolytic carbon.
2. Step 2. Titanium — is material for — Pacemaker. The case is titanium.
3. Step 3. Pacemaker — has part — Oscillator. A pulse generator.
4. Step 4. Oscillator — is part of — Radio. A carrier frequency oscillator.

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