The Doppler frequency can be obtained as a heterodyne or beat effect.由于外差或频差效应,能够得到多普勒频率.That's a heterodyne receiver.那是外差式接收机.Function test and calibration self - heterodyne curve for direction finder on sea trial....
That's a heterodyne receiver.那是外差式接收机.The Doppler frequency can be obtained as a heterodyne or beat effect.由于外差或频差效应,能够得到多普勒频率.Function test and calibration self - heterodyne curve for direction finder on sea trial....
Unplug the combination flasher from the junction block.从接线盒中拔出组合闪光器.Flasher is optional in accordance with user, s requirement.根据用户要求可以加装闪光器.This paper presents the contactless control of flasher with triode.提出了用三级管导通和截止...
Two telegrams for Li Kuei to send off at once.两个电报派李贵去打.Scores of congratulatory telegrams and letters greeted Franklin on his return.富兰克林一回来，就收到了好几十封贺电和贺信。Scores of congratulatory telegrams and letters greeted Franklin ...
Vietnam has emerged as the world's third-biggest rice exporter.越南已跃居世界第三大稻米出口国。The country is a net exporter of food.该国是食物净出口国.Switzerland is a big exporter of watches.瑞士是手表出口大国....