This method is called every time the system needs to understand how to build any single row of the table view.
每次调用此方法，系统都需要了解何如构建表视图的任何单行。
Get-the get method returns a single row from the table given an integer ID.
get—如果被给予一个整数ID, get方法将返回表中的一行。
Radial anti friction bearing, in particular single-row spherical roller bearing, and method for mounting thereof.
径向滚动轴承，尤其是单列球面滚柱轴承，及其安装方法。
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