一台三相6极异步电动机，工频下额定转速nN=1460r/min，其转差率为（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69508' and id < 4502904 and id<>'4502904' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69508' and id > 4502904 and id<>'4502904' order by id asc limit 5