500kV变电站需要（ ）设备才能完成1588对时功能。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29463' and id < 2399331 and id<>'2399331' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29463' and id > 2399331 and id<>'2399331' order by id asc limit 5