操作折弯机时，可以由多人来控制脚踏开关。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30405' and id < 2458057 and id<>'2458057' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30405' and id > 2458057 and id<>'2458057' order by id asc limit 5