EXist XML database: Download the eXist database, an open source database-management system that stores XML data according to the XML data model and features efficient, index-based XQuery processing.
eXist XML数据库：下载eXist数据库，一个开源数据库管理系统，它根据XML数据模型存储XML数据，并以高效、基于索引的XQuery处理著称。
The key problem of the excavation of the main carven system is to determine the best excavation sequence and excavation options according to the concrete features of the project.
如何结合工程具体特点，确定最优的爆破开挖程序和开挖方法，这是主厂房系统爆破开挖的关键所在。
Mechanical driving system: the equipment user can choose stirring speed according to process features of the products.
机械传动系统：设备用户可根据产品工艺特点任意选择搅拌转速。
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