Take part in line survey, complaintinvestigation, on-site troubleshooting.
参与线上检测，投诉调查，以及现场事件处理。
2
All investigating agents are required to file a signed minute for the final result of the complaintinvestigation process as well as the customer satisfaction survey.
并由问题处理人员的签名，及最终处理结果和客户的满意程度。
3
In the mean time, Alstom has also filed a complaint with the European Commission, which has launched an investigation.