obstruction signal button 遮断信号按钮
signal reset button 信号复归按钮
pedestrian push-button signal controller 行人按钮信号控制机
signal push button 信号按钮
Multifrequency push-button signal reception 多频按键信号的接收
push button signal box 按钮式信号楼
pedestrian push-button signal 按钮式交通信号机
Push button pedestrian signal 行人触动号志
engine signal panel check button 发动机信号盘检查按钮
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