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
5311233 - Regulatory safety and emissions inspection services for heavy trucks and buses
Safety inspections and emissions tests of heavy trucks and buses, to certify that they meet regulatory requirements.
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