To sign the external quotation to the customer department and the customer.

将客户部与客户签署的外部报价报于财务。

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The firm has an excellent customer service department.

该公司有一个非常出色的客户服务部。

《柯林斯英汉双解大词典》

For example, one department might define "customer" quite differently than another department.

例如，一个部门定义的“客户”可能与另一个部门的定义存在很大的差异。

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Though inside sales frequently involves an element of inbound call handling like a customer service department, in its pure form it is not customer service.

FORBES: What is Inside Sales? The Definition of Inside Sales

"British Gas have a customer complaints department who would not even deal with it, " he said.

BBC: British Gas mistakes revealed

He jokes about people believing it was just the customer service department calling him.

FORBES: Dear Nike: I Can't Tie My Shoes