'
很专业的介绍。值得收藏。下载不完全?一共有几个视频文件?
哪位如有听不懂的地方,本人听力尚可,乐意帮助(不保证100%听懂,99%差不多)。或者也许会有人可以考虑帮它配字幕?很好的培训材料。
'
呵呵,我可以加入字幕。我又清晰版本的文件。呵呵。我只找到这一个。下面是对这个视频的介绍。+我qq吧。505496467
national archives and records administration international morse code, hand sending department of defense. department of the army. office of the chief signal officer. (09/18/1947 - 02/28/1964) arc identifier 36813 / local identifier 111-tf-3697. principles and basic technique for good, rhythmic sending 0f morse code by operating the hand key. made possible by a donation from mary neff.