The function retrieves the item information for an order line and performs the necessary stock updates.

该函数为一个订购项（order line）检索产品信息，并执行必要的库存更新。

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The order is represented by a business object that contains a number of simple type attributes and an array of order line items as shown in Figure 3.

订单由包含许多简单类型属性和一个订单行式项目数组的业务对象表示，如图 3 所示。

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The order is represented by a business object that contains a number of simple type attributes and an array of order line items as shown in Figure 3.

订单由包含许多简单类型属性和一个订单行式项目数组的业务对象表示，如图 3 所示。

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