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Paragraph ML20 Technical Note:

Original text. Later amendments are not shown.

Cryogenic and “superconductive” equipment, as follows, and specially designed components and accessories therefor:

a.

Equipment specially designed or configured to be installed in a vehicle for military ground, marine, airborne or space applications, capable of operating while in motion and of producing or maintaining temperatures below 103 K ( – 170°C);

b.

“Superconductive” electrical equipment (rotating machinery and transformers) specially designed or configured to be installed in a vehicle for military ground, marine, airborne or space applications, capable of operating while in motion;

except

Direct-current hybrid homopolar generators that have single-pole normal metal armatures which rotate in a magnetic field produced by superconducting windings, provided those windings are the only superconducting component in the generator.