Jet fighter and vacuum pump: what they have in common

1. Step 1. Jet fighter — has part — Radar. A radar.
2. Step 2. Radar — has part — Magnetron. The cavity magnetron made compact radar possible.
3. Step 3. Magnetron — uses — Vacuum. It works in a vacuum.
4. Step 4. Vacuum — is used in — Vacuum pump. The pump creates a vacuum.

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