The SHIP logic on the federated server then sends' Fetch 'requests to read a block of data from the result of the query sent to the "US" data source and places the data into the SHIP buffer.
然后，联邦服务器上的SHIP逻辑发送'Fetch '请求，以便读取来自被发送到“US ”数据源的查询的一块数据，并将数据放入ship缓冲区。
CAD data are a main data source of GIS, and many problems will come forth when they are converted into GIS format, including losing block information, or point feature changed.
CAD数据作为GIS的一种主要数据源，转换为GIS格式后将出现图块信息丢失或点要素性质改变等问题。
CAD data are a main data source of GIS, and many problems will come forth when they are converted into GIS format, including losing block information, or point feature changed.
CAD数据作为GIS的一种主要数据源，转换为GIS格式后将出现图块信息丢失或点要素性质改变等问题。
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