There are other forms too. The educational television are providing services through the public broadcasting networks and through closed-circuit transmissions within school systems.
电视还有其他节目类型。教育电视节目为公共广播网和学校闭路传输系统提供节目。
This paper presents the origin of the exploitation of the direct current pluse width velocity modulation educational system and its circuit, moreover, goes on the waveform analysis.
介绍了直流脉宽调速实验系统的开发由来及线路，并进行了波形分析。
This paper presents the origin of the exploitation of the direct current pluse width velocity modulation educational system and its circuit, moreover, goes on the waveform analysis.
介绍了直流脉宽调速实验系统的开发由来及线路，并进行了波形分析。
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