secondary receiver的意思|示意

This paper introduces the project model integrating the course practical training of television receiver technology with secondary worker skill examination in electronics.

采用电视接收技术课程实习与家用电子产品维修工中级工技能考核相结合的“双证融通”项目模式，在实践中取得了较好的教学效果。

The system uses the emitter to send ultra high frequency signals after coding with signal coder and the secondary superheterodyne mixing receiver to accept the moving target signals.

系统中发射器采用编码器编码后发送超高频信号，接收器采用二次混频型超外差式接收移动目标信号。