1. A device for tuning, especially an electronic circuit or device used to select signals at a specific radio frequency for amplification and conversion to sound. 
   调节器，调谐器用来进行调节的装置，尤指一种电子电路或电子装置，用来选择某一特定发射频率的信号来放大并转换成声音
2. a semiconductor device capable of amplification. 
   能够扩大的半导体装置。
3. microwave amplification by stimulated emission of radiation 
   微波受激发射放大
4. radiation detector signal amplification and readout circuit 
   辐射探测器信号放大与读出电路
5. laser-light amplification by stimulated emission of radiation 
   激光

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