signalling key of pull type的意思|示意
美 / /
英 / /
拉式信令键
signalling key of pull type的网络常见释义
拉引式信号开关 ... signalling frequency ==> 铃流频率 signalling key of pull type ==> 拉引式信号开关 signalling key of push type ==> 按压式信号开关 ...