本程序把lisp程序进行加密：删除注释字符，删除缩进，把单行文字变成很长的一行。-This lisp peogram for the use of protection of lisp program:delete de zhushi,delete the tab, and make the program one line.

煤矿用皮带机保护控制装置的电气系统图，方便从事该行业的人员学习使用。-Coal mine belt conveyor protection control device electrical system diagram to facilitate the use of personnel in the industry to learn.