... 按键通话电路 press to talk circuit 按键通话方式 press talk switch; press talk system; press-talk system 按键通话手机 push to talk handset ...
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press-talk system 按键通话方式 ; 电话的按讲制
press-to-talk system 按钮对讲系统
press to talk communication system 按键通话通信方式
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