North American Product Classification System (NAPCS) Canada 2017 Version 2.0
- 381 - Electrical components
- 38122 - Power, distribution and other transformers, and transformer parts
- 381221 - Power and distribution transformers
- 3812211 - Power and distribution transformers
- 381222 - Other transformers and transformer parts
- 3812221 - Specialty transformers (except fluorescent lamp ballasts)
- 3812222 - Other transformers n.e.c. and transformer parts
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