Are you satisfied with the response speed of customer service engineer?
您对SFBD的客户退返支持工程师的响应速度是否满意？
Engineer provide service on per working day per month, at customer location appointed.
工程师每个月的每个工作日都到客户指定场所提供服务。
Engineer provide service on per working day per month, at customer location appointed.
工程师每个月的每个工作日都到客户指定场所提供服务。
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