Germanium and monitor: what they have in common

1. Step 1. Germanium — is material for — Thermal camera. Thermal camera lenses are germanium.
2. Step 2. Thermal camera — has part — Image sensor. A microbolometer array.
3. Step 3. Image sensor — is part of — Security camera. A sensor.
4. Step 4. Security camera — has part — Monitor. A guard watches the camera feed on a monitor.

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