Armoured personnel carrier and router: what they have in common

1. Step 1. Armoured personnel carrier — evolved into — Infantry fighting vehicle. An armed APC.
2. Step 2. Infantry fighting vehicle — has part — Cannon. An autocannon.
3. Step 3. Cannon — includes — Anti-aircraft gun. A gun.
4. Step 4. Anti-aircraft gun — uses — Radar. Radar guidance.
5. Step 5. Radar — has part — Antenna. An antenna emits and receives.
6. Step 6. Antenna — is part of — Router. Antennas.

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