elevators电梯elevatorn.<美>电梯；飞机升降舵；斗式皮带输送机elevators air-conditioner电梯空调elevator energy consumption电梯能耗elevator liability insurance电梯责任保险Elevator traffic dispatching电梯交通配置elevator car leveling device车厢平准装置elevator-type pickup loader升运器式捡拾装载机elevator casing wearing plate升降机罩衬板elevator model control system电梯模型控制系统elevator group eontrol system电梯群控系统elevator group control system电梯群控系统