Establish good business relationship with customer, collect market information and feedback.

与客户建立良好的合作关系，收集并反馈客户信息。

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And offer after - sale service and information feedback to the customer.

并给予客户售后服务及信息反馈。

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And offer after - sale service and information feedback to the customer.

并给予客户售后服务及信息反馈。

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