N pole 北极
pulsation n pole 脉动极
wooden n pole line 木杆线路
gin n pole derrick 桅杆式起重机
n-fold pole n 阶极点
n-order pole n级极点
n-th order pole n级极点
In fact, however, the N-pole side and the S-pole side are excited through the same field winding, which means that this model shows MMF that is only half the actual value.
事实上，N极边和s极边由相同的励磁绕组励磁，这意味着模型中的磁动势只是实际磁动势的一半。
The step through test and independent activity were used to observe effect of uneven constant magnetic field pole N and S on learning and memory impairment induced by hypobaric hypoxia .
用避暗实验法和自主活动法，分别观察了非均匀恒磁场N极、S极对急性低压缺氧引起的学习记忆障碍的影响。
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