Traction motors and main generators for locomotives high speed excites for turbo-generators, rolling mill motors, and main generators, a. C, commutator motors and other d. C. Motors with some difficulties of communtation

• 机车牵引电动机和主发电机,汽轮发电机的高速磁机,轧钢电动机和主发电机,交流整流子电动机和其他换向困难的直流电动机