一各大态半导体元件组成的装置采用了先进电子控制技术，设计先进，合理；安装调试简单、方便；控制交流电机的起、停无机械触点，无需更换触......

Prof. Huang Kun made many pioneering contributions in solid-state physics. In the late 1940s, for example, he theoretica......