百度
谷歌
图片
维基
百科
signal box
signal box layout
signal bridge
signal broadcast multiaccess c...
signal bronze
signal bumping
signal cabin
signal cable
signal capture
signal carrier
signal carrier frequency
signal center
signal centre
signal chain
signal channel
signal channel probe
signal check
signal circuit
signal circuit control(l)er
signal circuit controller
signal circuit diagram
signal classifier
signal clear aspect
signal code
signal code book
signal code capacity
signal coding equipment
signal coloration
signal communication
signal communication system
signal box layout
signal bridge
signal broadcast multiaccess c...
signal bronze
signal bumping
signal cabin
signal cable
signal capture
signal carrier
signal carrier frequency
signal center
signal centre
signal chain
signal channel
signal channel probe
signal check
signal circuit
signal circuit control(l)er
signal circuit controller
signal circuit diagram
signal classifier
signal clear aspect
signal code
signal code book
signal code capacity
signal coding equipment
signal coloration
signal communication
signal communication system
signal box
n.
(铁路上的)信号塔, (警察或火警系统的)警报箱
(铁路上的)信号塔, (警察或火警系统的)警报箱