We talk about Morse code, named after its inventor ... one for each letter of the alphabet. Later improvements by Wheatstone and Cooke reduced the number of wires to five, but that still wasn ...
The code uses a combination of short and long pulses – dots and dashes, respectively – that correspond to letters of the alphabet. The International Morse Code encodes the 26 letters of the ...
当前正在显示可能无法访问的结果。
隐藏无法访问的结果