subscribern.签署者；捐献者；订户subscribevt.订阅；签名；支持；捐赠；同意subscriber installation用户装置, 用户设备subscriber line network用户线路网subscribe to an opinion同意某一意见subscriber calling rate用户呼叫率Subscriber Trunk Dialer用户干线拨号器subscribers' trunk unitsubscriber concentrator用户集中器subscriber rs extension用户分机subscriber rs protector用户话机保安器subscriber plant factor用户设备因数