Hydrogen and rolling mill: what they have in common

1. Step 1. Hydrogen — is used in — Saturn V. Hydrogen stages.
2. Step 2. Saturn V — evolved from — V-2 rocket. Von Braun went from the V-2 to the Saturn.
3. Step 3. V-2 rocket — is made of — Oxygen. The oxidizer is liquid oxygen.
4. Step 4. Oxygen — uses — Air separation. Industrial oxygen.
5. Step 5. Air separation — is used in — Steel works. The basic oxygen process uses industrial oxygen.
6. Step 6. Steel works — has part — Rolling mill. Rolling mills.

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