The pure quartz lump becomes quartz tube via untouched technology of intermediate frequency induction heating.
采用中频感应加热无接触技术，将石英净坨拉制成为石英管。
Conventional dual up-conversion transmitter usually employs an intermediate frequency (IF) mixer and a radio frequency (RF) mixer to convert baseband user signal to IF and RF in sequence.
传统双上变频发射器通常采用中频(IF)混合器和射频(RF)混合器将基带用户信号依次转换成IF和RF。
Finally the fruit of research for my master degree presents in the way of actual de-hopping and digital intermediate frequency receivers that have passed the examination.
最终以通过检测的跳频解跳与数字中频接收机的实物作为硕士期间的研究成果呈现。
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