Pressurized cabin and router: what they have in common

1. Step 1. Pressurized cabin — is part of — Jet airliner. A pressurized cabin.
2. Step 2. Jet airliner — has part — Radar. A weather radar.
3. Step 3. Radar — has part — Antenna. An antenna emits and receives.
4. Step 4. Antenna — is part of — Router. Antennas.

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