At that time, Westinghouse single-phase systems employed 133-cycle current so customers would not see their incandescent lamps flickering.
At that time, Westinghouse single-phase systems employed 133-cycle current so customers would not see their incandescent lamps flickering.
然而，那时西屋的单相系统用的是133赫兹的电流，这样顾客才看不出白炽灯在闪烁。