Warning: file_put_contents(/www/wwwroot/ppbbu/62383.com/cache/f08d937a03d7c4811255061ca20775c5.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/62383.com/index.php on line 55 radiotelephony是什么意思，radiotelephony的翻译，radiotelephony音标、读音、用法和例句_流逝汉英词典
Lee de Forest reads a paper before an AIEE meeting on the Audion, first of the vacuum tubes that would make long distance radiotelephony possible. 電子琯的首次使用將使長途無線電話變爲可能。