... signal handling equipment 信号处理系统 signal horn 信号笛 signal horn 信号喇叭 ...
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短语
雾中信号笛
diaphone
汽笛信号
whistle signal
;
siren signal
;
whistlesignals
信号汽笛
signal whistle
号笛信号灯
signalling light for air horn
;
signaling light for air
信号风笛
signal whistle