正常齿渐开线标准直齿外齿轮齿根圆有可能大于基圆。（ ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='7808' and id < 619151 and id<>'619151' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='7808' and id > 619151 and id<>'619151' order by id asc limit 5