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file:阳胜峰s7-300plc视频教程.rar file:西门子视频PLC-10.rar file:西门子教程+安装+资料+例子.zip file:西门子STEP_7综合视频教程.rar file:西门子Step7V5.5_CN软件.rar file:西门子S7-300 400教程阳胜峰40讲.rar