Logic gate and turbojet engine: what they have in common

1. Step 1. Logic gate — has part — Transistor. Gates are built from transistors.
2. Step 2. Transistor — is part of — Pacemaker. The first pacemakers used transistors.
3. Step 3. Pacemaker — is made of — Titanium. The case is titanium.
4. Step 4. Titanium — is material for — Turbojet engine. Compressor blades.

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