Summary of "Munitions List" Category 2-20:
 

The above summary by the Coalition to Oppose the Arms Trade (COAT) was derived from a detailed description of this category of munitions published by the Department of Foreign Affairs and International Trade Canada (DFAIT) in a document called A Guide to Canada’s Export Controls (June 2006).
http://www.international.gc.ca/controls-controles/assets/pdfs/documents/exportcontrols2006-en.pdf

The above DFAIT document describes seven different groups of products on the "Export Control List" whose export is "controlled" by the Government of Canada.  One of these seven groups, known as "Group 2" or the "Munitions List," is comprised of 22 categories of military products.  These are the categories of products whose export is documented in a series of DFAIT documents published since 1990, called Export of Military Goods from Canada.

Here is a quotation about this particular category of munitions from the relevant section of A Guide to Canada’s Export Controls:

2-20

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);

Note:

2-20.a. includes mobile systems incorporating or employing accessories or components manufactured from non-metallic or non-electrical conductive materials, such as plastics or epoxy-impregnated materials.

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.

Note:

2-20.b. does not control 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.