double stage voltage regulator

... 双金属传感器：BS Bimetal Sensor 双节电磁振动式调节器：double stage voltage regulator 双铰接式摆动轴：double joint swig axle ...

 single stage voltage regulator

...omagnetic regulator (vibrating type regulator) 单级电磁振动式继电器 single stage voltage regulator 双节电磁振动式调节器 double stage voltage regulator 调节电阻 ..