XML已成为网络上对数据进行描述和传送的通用语言，其自描述性非常适用于不同应用间的数据交换。
The XML has become the language for general use to describe and deliver data on network for the exchange of the data commutation.
在与外界无物质交换的条件下，材料内部裂纹与损伤的愈合靠内部物质迁移及结构变化完成。
On the condition that there is no material commutation with outside, healing of internal crack and hurt of material depends on the move of internal material and the change of structure.
利用OPC可以很方便地实现管理系统与控制系统的数据交换，使二次开发变得很容易。
Make use of the OPC can carry out the data commutation of manage the system and the control system very expediently, making develop two times to become very easy.
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