A system of high frequency electronic circuit was used in the teaching and experiment concerning the high frequency emission.
一种高频电子线路的实验系统，用于高频发射的教学与实验。
A system of high frequency electronic circuit was used in the teaching and experiment concerning the high frequency emission.
一种高频电子线路的实验系统，用于高频发射的教学与实验。
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