Emergency alarm device的意思|示意

紧急报警装置 ...文网 关键词】：机房;井道;紧急报警装置;对重;缓冲器;底坑;轿厢装潢; [gap=532]Keyword]: room; shaft; emergency alarm device; counterweight; buffer; pit; elevator car decoration; ..

紧迫报警安装 ... Emergency Push Button 报警按钮 Emergency alarm device 紧迫报警安装 Elevator exclusive intercom 电梯专用对于道体系 ...