说明：  在C#环境中对读取WinCC过程值归档数据的封装类，提供了简单直接的接口就能查询出归档数据。查询支持指定多个归档点，支持设置步长和数据的读取方式（包括使用插补）。注：需要已经安装WinCC Connectivity Pack。
(In C# environment for reading WinCC process value archive data package class that provides a straightforward interface to be able to query the archived data. Query support specify multiple archive points, support for reading mode setting step and data (including the use of interpolation). Note: You need already installed WinCC Connectivity Pack.)