是实验操作过程的详细讲解，有源程序即控制：转，停；正，反；快，慢；...

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是实验操作过程的详细讲解，有源程序即控制：转，停；正，反；快，慢；-experimental operation is the detailed talks, a source that is control : turn and stop; Now, anti-; Fast, slow;