电磁辐射发射电平
electromagnetic radiation levels
耦合的平行－串联二级反应
Competitive-consecutive-coupling second-order reac
平行串行操作
parallel serial operation
parallel， serial operation
Parallel
Serial operation
骚扰源的发射电平
emission level of a disturbance source
自动黑电平电路
automatic black level circuit
超声波发射电路
ultrasonic transmitting circuit
电光发射电路
optoelectrical emission circuit
发射电路与接收电路
Transmitting and Receiving Circuit