超声波机床工作时可以用手触摸工具杆。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30405' and id < 2458011 and id<>'2458011' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30405' and id > 2458011 and id<>'2458011' order by id asc limit 5