Doppler radar and rolling mill: what they have in common

1. Step 1. Doppler radar — has part — Antenna. An antenna.
2. Step 2. Antenna — is part of — Shukhov Tower. A radio tower.
3. Step 3. Shukhov Tower — is a kind of — Hyperboloid structure. A hyperboloid tower.
4. Step 4. Hyperboloid structure — has part — Beam. Straight bars form a curved surface.
5. Step 5. Beam — includes — I-beam. A beam.
6. Step 6. I-beam — uses — Rolling mill. Rolling.

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