Superconductivity and paper machine: what they have in common

1. Step 1. Superconductivity — is used in — Superconducting magnet. A superconducting winding.
2. Step 2. Superconducting magnet — is made of — Helium. It is cooled with liquid helium.
3. Step 3. Helium — is used in — Airship. After the Hindenburg — helium.
4. Step 4. Airship — evolved from — Hot air balloon. A steerable balloon.
5. Step 5. Hot air balloon — is made of — Paper. It was lined with paper on the inside.
6. Step 6. Paper — uses — Paper machine. Industrial production.

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