📁 弗奥克斯赫奥尔埃
Foxhole radios are simple radio receivers constructed from a minimum of materials, typically a razorblade, a safety pin, a coil of wire, and sometimes a short piece of pencil lead. These devices were made by soldiers in World War II for entertainment, or were operated clandestinely by prisoners.
条目 (1+)
OpinionJournal - Best of the Web Today
http://www.wsj.com/news/types/best-of-the-web-today