Standard Code | Standard Title | Standard Class | Order |
---|---|---|---|
GY/T 273-2013 |
Technical requirements and measurement methods of low power SW multifrequency broadcasting transmitters 小功率短波多频发射机技术要求和测量方法 |
China Radio, Film & TV Industry
Standards multifrequency |
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TB/T 1692-1993 |
(Switched Telephone Network Rail multifrequency register signaling mode) 铁路电话交换网 多频记发器信号方式 |
China Railway & Train
Standards multifrequency |
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