大戰期間,美国發明了一種通訊利器,叫做『走著說著』(Walkie-talkie),這是一種輕便靈巧,可以攜來攜去,不藉電線,自由通話的雙向無線電新機件,戰時前方的部隊部用牠和後方通話。戰後推广为移動無線電發收話器(Mobile Transmitter and Receiver),它的用途及於公共汽車的驾駛者,货運工程師,和非常時的救護隊員,为和平建設的一大利器。 During the war, the United States invented a communication weapon called Walkie-talkie, a light-weight, portable two-way radio that can be carried around without wires and used to talk freely. During wartime The unit in front of it uses it to talk to the back. The post-war promotion was Mobile Transmitter and Receiver, its use and its role as bus driver, cargo engineer, and ambulance ambulance officer, a major weapon for peace.