In the gap magnetic field of pole changing synchronous machine, there would be large harmonics, which have some effects on the operating performance of the machine.
由于变极同步电机气隙磁场中将存在较大的谐波，这些磁场谐波对电机运行性能将产生一些影响。
The pole columns of the circuit-breaker are each mounted on a base 11, to the side of each of which an operating mechanism cubicle 15.1 is fitted.
断路器的每相极柱分别安装在基架11上，每个基架旁边都有一个操作机构箱15.1。
The utility model discloses a pair of double-pole operating forceps for a thoracoscope and an abdominoscope.
本实用新型公开了一种胸腹腔镜双极手术钳。
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