例如，当企业的销售部门从顾客那里收到订单，并发布了生产指令来生产顾客购买的产品时，它就可以担任请求客户机的角色。

For example, a company's sales department can act as a requesting client when it receives an order from a customer and issues a production order to produce the items the customer purchased.

youdao

后台管理部分包括：商品信息的管理、用户订单的管理、普通管理员的管理、客户的管理、投诉管理、各种即时信息的发布管理。

The background management includes the management of commodity information, user's orders, ordinary administrators, customers, complaints and issue of all kinds of immediate information.

youdao