发电机定子三相绕组在空间布置上，其各相绕组轴线相差（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69444' and id < 4497187 and id<>'4497187' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69444' and id > 4497187 and id<>'4497187' order by id asc limit 5