Circa 1950, The switchboard of a police department, where all calls other than emergency ones are handled. (Photo by FPG/Getty Images) 人民 電纜 通信 Radio Police
A Chesterfield Borough Police telephone operator tests a gasmask with built in earpiece and microphone. The telephone service is considered one of the most important links in the coordination of ARP operations and must remain operational during air raids, 12th April 1939. (Photo by Fox Photos/Hulton Archive/Getty Images) Protective Mask - Workwear 人民 風險 Masked Operator
Checking police records and answering phone calls to the Detective Bureau of Information in New York.. 工作 公司業務 成熟的成年人 Bureau Of Information
Doctor wearing a protective mask talking on a mobile phone in a hospital setting. 防護面具 人 白色的背景 醫學, 專業人員, 在