Were there no transformers to switch the voltage, long-distance transmission of electricity would be impossible?
要是没有变压器来调节电压，远距离输送电力是不可能的。
Objective To realize foot switch long-distance control of PC for medical image acquisition.
目的：利用脚踏开关远距离脚踏控制PC进行医疗图像采集。
Objective To realize foot switch long-distance control of PC for medical image acquisition.
目的：利用脚踏开关远距离脚踏控制PC进行医疗图像采集。
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