permanent magnet instrument

• 永磁式仪表

permanent magnet instrument的用法和样例：

例句

1. The basic principle of biasing magnet automatic resonance regulated Petersen Coil and its operating condition at Wuzhan substation were introduced.
   摘要介绍了偏磁式自动调谐消弧线圈装置在武汉市武展变电站运行的状况。