n.售后服务
Shanghai Dongchang Auto After Service Co., Ltd. 上海东昌汽车售后服务有限公司。
Be responsible for FM product after service. 负责无线调频产品的售后服务。
Few after service: Ready to abandon product, no need to maintain. 售后服务少：即弃型产品，不需要维护。
How can the client be given the perfect after service? 如何能给顾客全面、及时的服务?
Application must have an operational after service and warrantee. 有完整可行的售后服务及退换货承诺。
