Ultrasound transducer probe and r-7 rocket: what they have in common

1. Step 1. Ultrasound transducer probe — is part of — Ultrasound scanner. An array of piezoelectric elements.
2. Step 2. Ultrasound scanner — has part — Digital signal processor. Forming the image.
3. Step 3. Digital signal processor — is part of — Doppler radar. It picks out the Doppler shift.
4. Step 4. Doppler radar — has part — Antenna. An antenna.
5. Step 5. Antenna — is part of — Sputnik 1. Four whip antennas.
6. Step 6. Sputnik 1 — uses — R-7 rocket. Launched by an R-7 rocket.

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