listening sonar

监听声纳,listening... ... ) monitoring speaker 监听扬声器 ) listening sonar 监听声纳 ) listening induction 监听声纳系统 ...

英语语言词典 # 翻译 ... ... 听唤插头 listening plug 听唤声纳 listening sonar 2 助听用的 wear a ~button in one's ear ...