可能需要危险货物运输(TDG)的认证，急救，消防，或工作场所有害物质信息系统(WHMIS)。
Certification in the transportation of dangerous goods (TDG), first aid, firefighting, or workplace hazardous materials information system (WHMIS) may be required.
可能需要具备工作场所有害物质信息系统WHMIS，危险货物运输t DG，和安全实践的课程认证。
Certification in workplace hazardous materials information system (WHMIS), transportation of dangerous goods (TDG), and courses in safety practices may be required.
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