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重呼键
又称为"R" 键
telecom.
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重呼键
又称为"R" 键，相当于短促拍击叉簧; 原指用户拍叉簧，使共电交换机信号灯闪烁，引起话务员的注意，现沿用为电子式电话机对程控交换系统的功能控制键
telecom.
flash
重呼键:
2 phrases
in 1 subject
Telecommunications
2
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