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police radio
Police radio is a communications radio system used by law enforcement agencies all over the world.
Many such systems are encrypted to prevent eavesdroppers from listening in.
==Portable radios==
The vast majority of economically developed countries police services have access to such equipment; also, in most countries, police cars have sets which are designed to receive calls from the control room, and respond. Also, small personal radios exist that allow each officer to carry one easily, as well as a large central room at the Police station which directs personnel to the location of emergency incidents. Portable police radios first appeared within the British police in 1969.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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