【物理】一点一划相间的代码【电学】莫尔斯电码

dot-and-dash code telegraph transmitter

dot-and-dash code, code bar

dot-and-dash code telegraphy reception

dot-and-dash

dot-and-dash line【计】

dot-and-dash code telegraph communication

dot-and-dash【通信】

dot-and-dash code, code disc