同义词
1)automatic switching unit,自动交换机2)automatic exchange,自动交换机3)electronic automatic exchange,电子自动交换机4)private automatic exchange(PAX),内部自动交换机5)PAX,小型自动交换机6)private automatic exchange (PAX),专用自动交换机7)community automatic exchange,公共自动交换机8)private automatic exchange,专用自动交换机9)electronic anutomatic exchange,电子自动交换机10)RAX Rural Automatic Exchange,农村自动交换机
