North American Product Classification System (NAPCS) Canada 2017 Version 2.0
- 531 - Transportation support services
- 53112 - Motor vehicle maintenance and repair services
- 531123 - Maintenance and repair services for heavy trucks and buses
- 5311231 - Maintenance and repair services for heavy trucks and buses (except washing and cleaning, and regulatory safety and emissions inspections)
- 5311232 - Washing and cleaning services for heavy trucks and buses
- 5311233 - Regulatory safety and emissions inspection services for heavy trucks and buses
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