signal end信号端signaln.信号；标志v.(发信号)通知、表示adj.显著的Signal Calibration System信号较准系统signal delivery mechanism信号传递机制signaling gateway process信令网关进程signal-control crossing信控交叉口signal data recorder unit信号数据记录器signal parameter analysis信号参数分析signal channel estimation信道估计signal by sounding a bell以铃声为信号Signal to Crosstalk Ratio信号串音比signal lamp transformator信号灯变压器