如果您希望使用MTOM发送附件数据。

If you want to use MTOM to send attachment data.

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客户端需要显式调用这个操作来从数据存储中删除过期的附件数据。

The client needs to explicitly call this operation to remove the obsolete attachment data from the data store.

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图50显示，在调用checkout服务之后，附件内容成为原始附件数据。

Figure 50 shows that the attachment content becomes the original attachment data after calling the checkout service.

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