为保证发电厂厂用低压单个或成组电动机可靠启动，要求厂用母线电压不低于额定电 压的(    )。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69521' and id < 4503998 and id<>'4503998' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69521' and id > 4503998 and id<>'4503998' order by id asc limit 5